Answer:
Total of 4 isomers of hepta-2,4-diene are given
Explanation:
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Which statement best describes the charges of the particles involved?
(1 point)
O A neutral particle is striking a positive particle, breaking it into more
O A negative particle is striking a positive particle, breaking it into mor
O A positive particle is striking a neutral particle, breaking it into more
O A neutral particle is striking a negative particle, breaking it into more
The statement that best describes the charges of the particles is : ( A ) A neutral particle is striking a positive particle, breaking it into more
Production of Negative and Positive particlesThe collision of Neutral and postitve particles leads to the production of more negative and positive particles. Due to the neutral force and this leads to the production of an electrical charges.
Hence a neutral particle striking a positive particle will lead to the production of more positive particle.
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which level of protein structure do beta-pleated sheets and alpha helices represent?
1.5 of potassium ioxcide in 150cm^3 of solution
Answer:
Explanation:
I'm not sure what is being asked, not the units of "1.5." I don't know of potassium "ioxicide." Was "dioxide" intended?
I'll assume the question is "What is the concentration, in Molar, of 1.5g of potassium dioxide in 150cm^3 of water (150cm^3 is 150 ml).
The molar mass of K2O, potassium dioxide, is 94.2 g/mole. 1.5g is (1.5g/94.2 g/mole) or 0.0159 moles of K2O. The definition of Molar is moles/liter. So take the moles of K2O and divide by the liters, which is 0.150L in this case.
(0.0159 moles K2)/0.150 L = 0.106 M K2O
A dog has a mass of 12 kg. What is its weight? Round your answer to tr
The dog weighs
NA dog has a mass of 12 kg. What is its weight? Round your answer to the nearest whole number.
The dog weighs
N.
Answer:
118
Explanation:
Which statement best describes property’s of elements
Answer:
matter
Explanation:
some elements are solid
some are liquid and gas
which under one property
a) What is the role of electrons in an atom?
b) How do we determine how many electrons are in an atom?
Why does the reactivity of metals increase from right to left on the periodic table?
Metals on the right have fewer protons, making it harder to attract electrons from other atoms.
Metals on the right have more protons, causing valence electrons to be held more strongly.
Metals on the right have more valence energy levels, so the ability of the nucleus to attract electrons is reduced.
Metals on the right have fewer valence energy levels, so electrons are closer to the nucleus and harder to pull away.
Why does the reactivity of metals increase from right to left on the periodic table?
Metals on the right have fewer protons, making it harder to attract electrons from other atoms.
Metals on the right have more protons, causing valence electrons to be held more strongly.
Metals on the right have more valence energy levels, so the ability of the nucleus to attract electrons is reduced.
Metals on the right have fewer valence energy levels, so electrons are closer to the nucleus and harder to pull away.
Which feature is unique to Group 18 nonmetals?
They have more exceptions to reactivity rules.
They are very nonreactive.
They are very reactive.
They follow a different pattern of reactivity.
Which of the following combination of elements is the most reactive?
Na and Br
Cs and Br
Cs and I
K and I
How does Rb bond with other elements?
Rb loses two electrons.
Rb gains two electrons.
Rb loses an electron.
Rb gains an electron.
The characteristics of the reactivity of the periodic table allows to find the correct answers to the different questions are:
1) Metals on the right have more protons, causing valence electrons to be held more strongly.
2) They are very nonreactive.
3) Na and Br
4) Rb loses an electron
1) The reactivity of a chemical element is the tendency to combine with others, this increases as it has fewer electrons in its last layer and since they are more weakly bonded.
Consequently, halogens have seven electrons in their last shell tends to attract an electron to remain with the full level and the alkaline that an electron has in the last shell tends to lose the electron to remain with a complete shell.
If we examine the periodic table the number of electrons in the last shell decreases from right to left.
Let's review the different claims:
a) False. The elements on the right side have a higher atomic number, therefore more protons.
b) True. The elements have more protons therefore it has to attract other electrons and the reactivity decreases.
c) False. As it has more electrons, it has more energy levels, losing all the electrooens is more difficult, so the reactivity decreases.
d) False. By having more electrons it has more energy levels.
2) What is the unique characteristic of the elements of group 18
The elements of group 18 are the noble gases, they have their last full layer therefore they do not have.
the correct answer is: They are very nonreactive.
3) The reactivity in the period table decreases with increasing period therefore the element of period 3 is the most reactive in this case Sodium and Halogen of group 5 is the most reactive in this case Bromine.
the compound Na and Br is the most reactive of all.
4) Rubidium has 1 electron in its last shell, both in a chemical reaction pole loses the electron.
the correct answer is: Rb loses an electron
In conclusion, using the characteristics of the reactivity of the periodic table, we can answer the different questions..
1) Metals on the right have more protons, causing valence electrons to be held more strongly.
2) They are very nonreactive.
3) Na and Br
4) Rb loses an electron
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The whole Patterns of Reactivity Quick Check for Honors Chemistry is
1) B. Metals on the right have more protons, causing valence electrons to be held more strongly.
2) B. by gaining electrons
3) B. They are very nonreactive
4) A. Cs and Br
5) A. Rb loses an electron
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Which coefficient of O, is needed to balance the equation C3Hg+ 02 - 3C02 + 4H2O?
OA. 2
OB. 3
O c. 5
OD 6
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The coefficient of oxygen is five which is needed to balance the given chemical equation and equation is C₃H₈ +5 O₂[tex]\rightarrow[/tex] 3 CO₂ +4 H₂O.
Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.
A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .
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Hoàn thành dãy biến hóa sau :
S→SO2→SO3→H2SO4
Answer:
I don't know what your asking
If the atomic number is bigger then is the nuclear charge also bigger
Answer:
No
Explanation:
When atomic number is increasing its atomic mass increases
Atomic number doesn't affect nuclear charge
Which one of these is an example of a virus that can affect a range of hosts? A) the varicella virus B) the rabies virus C) the rhinovirus D) the rubella virus
Answer:
B) the rabies viru
Explanation:
what do an atom ion and isotope of an element have in common?
An atom ion and isotope of an element have in common that both have the same number of protons but they have different numbers of neutrons.
WHAT IS AN ION AND ISOTOPE?An ion is a charged atom while an isotope is the atoms of an element with the same atomic number but different atomic mass.
For example; Mg2+ is the ionic form of Magnesium while C-12 and C-14 are isotopes of carbon.
Here the ion of an atom will have a different charge but the same mass.
Also The isotope of an atom will have a different mass.
The number of protons V/S the more general atom, an ion has a different number of electrons, and an isotope, a different number of neutrons.
Hence atom ion and isotope of an element have in common that both have the same number of protons but they have different numbers of neutrons.
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How do two hydrogen atoms bond to form a molecule?
1 each hydrogen atom shares an electron to form a covalent bond
2 each hydrogen atom transfers an electron to form an ionic bond
Answer:
1: each hydrogen atom shares an electron to form a covalent bond
Explanation:
I took the quiz and this was correct!
what is the maximum theoretical number of water molecules with which, in theory, one urea molecule can hydrogen bond?
Answer:
The maximum number of molecules that one water molecule can hold through hydrogen bonding is 4 because the two hydrogen atoms of water can form two hydrogen bonds and the two lone pairs on oxygen can also form two hydrogen bonds. hope it helps
Kinetic energy in the form of moving waves of light or radiation
Answer:
radiation
Explanation:
Answer:
neither
Explanation:
Kinetic Energy is the physical movement of objects.
Which element most likely has the same number of valence electrons as silicon (Si)?
O germanium (Ge)
O arsenic (As)
O phosphorus (P)
O sulfur (S)
Answer:
germanium (Ge)
Explanation:
both belong to the same group
Answer:
A. germanium (Ge)
Which atom generally obtains a stable configuration by sharing electrons?
phosphorus (P)
magnesium (Mg)
lithium (LI
chlorine (CI)
Answer: Phosphorus (P)
Explanation: Phosphorous has 5 valence electrons so it will share some to become stable.
Answer: Phosphorus(P)
12. A beginner's bowling ball has a mass of 4.9 kg and a volume of 5.4 liters. Will it float in water,
which has a density of 1.0 g/mL?
Taking into account the definition of density and Archimedes' principle, the beginner bowling ball will float on the water.
But first it is neccesary to know that density is a quantity referred to the amount of mass in a certain volume of a substance or a solid object.
In other words, the density is the relationship between the weight (mass) of a substance and the volume that the same substance occupies.
The expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:
[tex]density=\frac{mass}{volume}[/tex]
In this case, a beginner's bowling ball has a mass of 4.9 kg and a volume of 5.4 liters. This is:
mass= 4.9 kg= 4900 g (being 1 kg= 1000 kg)volume= 5.4 L= 5400 mL (being 1L=1000 mL)Replacing in the definition of density:
[tex]density=\frac{4900 g}{5400 mL}[/tex]
Solving:
density=0.907 [tex]\frac{g}{mL}[/tex]
On the other hand, Archimedes' principle says that an object immersed in a liquid experiences an upward vertical force equal to the weight of the volume of the dislodged liquid.
The sinking or floating of an object is determined by its density with respect to that of the liquid in which it is submerged.
Considering water as the liquid where the object is submerged in this case, an object with a higher density than water will sink. In contrast, an object with a lower density than water will float.
In this case, considering that water has a density of 1 [tex]\frac{g}{mL}[/tex], the bowling ball for beginners has a lower density. This indicates that, having a lower density than water, the object will float.
In summary, the beginner bowling ball will float on the water.
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I'll pay someone to do my chemistry work.
Answer:
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tu solo di cuando donde
Explanation:
Give reason:
Why Phosphorous is stored under water.
Answer:
Phosphorus ( white) us highly reactive and ignites at about 30°C when exposed to moist air
ADVANTAGES AND DISADVANATAGES oF genectic enginerring
Advantages of Genetic Engineering?
1. It allows for a faster growth rate.
2. It can create an extended life.
3. Specific traits can be developed.
Plants and animals can have specific traits developed through genetic engineering that can make them more attractive to use or consumption. Different colors can be created to produce a wider range of produce. Animals can be modified to produce more milk, grow more muscle tissue, or produce different coats so that a wider range of fabrics can be created.
4. New products can be created.
5. Greater yields can be produced.
Genetic engineering can also change the traits of plants or animals so that they produce greater yields per plant. More fruits can be produced per tree, which creates a greater food supply and more profits for a farmer. It also creates the potential for using modified organisms in multiple ways because there is a greater yield available. Modified corn, for example, can be used for specific purposes, such as animal feed, ethanol, or larger cobs for human consumption.
6. Risks to the local water supply are reduced.
Because farmers and growers do not need to apply as many pesticides or herbicides to their croplands due to genetic engineering, fewer applications to the soil need to occur. This protects the local watershed and reduces the risk of an adverse event occurring without risking the yield and profitability that is needed.
7. It is a scientific practice that has been in place for millennia.
Humans in the past may not have been able to directly modify the DNA of a plant or animal in a laboratory, but they still practiced genetic engineering through selective breeding and cross-species or cross-breeding. People would identify specific traits, seek out other plants or animals that had similar traits, and then breed them together to create a specific result. Genetic engineering just speeds up this process and can predict an outcome with greater regularity.
What Are the Disadvantages of Genetic Engineering?
1. The nutritional value of foods can be less.
When animals grow, and mature quickly, the nutritional value of that product can be reduced. This can be seen in poultry products today with the white striping that is found in meat products. That striping is a fat deposit that was created, often in the breast meat, because of the rapid growth of the bird. In chickens, Good Housekeeping reports that this can increase the fat content of the meat consumed by over 220%. At the same time, the amount of protein that is received is also reduced.
2. Pathogens adapt to the new genetic profiles.
Genetic engineering can create a natural resistance against certain pathogens for plants and animals, but the natural evolutionary process is geared toward creating pathways. Bacteria and viruses evolve a resistance to the resistance that is created by the genetic engineering efforts. This causes the pathogens to become stronger and more resistant than they normally would be, potentially creating future health concerns that are unforeseen.
3. There can be negative side effects that are unexpected.
Genetic engineering is guaranteed to make a change. Many of those changes are positive, creating more and healthier foods. Some of those changes, however, can be negative and unexpected. Making a plant become more tolerant to drought might also make that plant become less tolerant to direct sunlight. Animals may be modified to produce more milk, but have a shortened lifespan at the same time so farmers suffer a greater livestock.
4. The amount of diversity developed can be less favorable.
At some point, genetically engineered plants and animals make it “into the wild” and interact with domestic species. This results in a crossing of “natural” and “artificial” organisms. The engineered organisms often dominate, resulting in only a modified species over several generations, reducing the diversity that is available.
5. Copyrighted genetic engineering can have costly consequences.
Many companies copyright their genetic engineering processes or products to maintain their profitability. If a farmer plants genetically modified crops and the pollination process causes another farmer in the field over to have those modified crops grow, there have been precedents for legal actions against the “unauthorized” farmer. This can have several costly consequences, from fewer farmers wanting to work to a higher cost for the seeds that are planted.
6. This knowledge and technology can be easily abused.
At the moment, genetic engineering in humans is being used to treat specific disorders that threaten the health or wellbeing of individuals. In time, the approach in humans could be like what is already being done with plants and animals. Genetic engineering can change specific traits, which could create human outcomes that are ethically questionable or easily abused.
explain the periodic table law of element
Elements of the periodic table are arranged in order of increasing atomic number. The periodic law states “When elements are arranged in order of increasing atomic number, there is a periodic repetition of their chemical and physical properties.”
I will brainless who can answer this all pleaseeeee
Answer:
I think the answer is yellow or White
Explanation:
because it is the visible light that I know
mask me as brainless
thanks
Which is the property of nonmetals to evaporate easily?
brittle
dense
liquid
volatile
Answer:
Volatile
Explanation:
Nonmetal are usually volatile, which means it evaporate easily.
--
Easy.
Answer:
Volatile
Explanation:
Nonmetals are usually volatile, so it means that they can evaporate easily.
List a few properties that elements in Group 1 have in common.
Answer:
The alkali metals are a group of chemical elements in the periodic table with the following physical and chemical properties:
shiny.
soft.
silvery.
highly reactive at standard temperature and pressure.
readily lose their outermost electron to form cations with a charge of +1.
Explanation:
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what is the purpose of the dts other auths and pre audits screen?
Answer:
It allows the traveler to justify questionable expense items.
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What causes the liquid in a thermometer to rise?
Answer:
The level of colored liquid rises when the thermometer is placed in hot water. Heat causes the molecules of the liquid to get farther apart. The molecules of the liquid break down into atoms and take up more space.
Explanation:
Write the electron configuration of the element fitting each of the following descriptions. a. The group 2A element in the fourth period b. The noble gas in the fifth period c. The group 2B element in the fourth period d. The group 6A element in the second period
Answer:
a. Calcium: [Ar]4s^2
or 1s^2 2s^2 2p^6 3s^2 3p^6 (= Argon) 4s^2
b. Xenon
c. Zinc
d. Carbon
Explanation:
Group 2A = Alkaline Earth; period 4 shows that the element will be calcium.
To write the Electron Configuration we remember that Columns 1&2 and Helium represent the s-orbital which holds a maximum of 2 electrons. Columns 13 through 18 fill the p-orbital.
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Potassium iodide is an ionic compound.
Describe what happens, in terms of electron loss and gain, when a potassium atom reacts
with an iodine atom.
Answer:
In this reaction, potassium atoms lose electrons to form positively-charged potassium ions (oxidation) and iodine atoms gain electrons to form negatively-charged iodide ions (reduction).
Explanation:
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In this process, iodine atoms get electrons to produce negatively charged iodide ions, whereas potassium atoms lose electrons to form positively charged potassium ions. Oxidation and reduction takes place.
What is oxidation ?Redox reactions include a change in the oxidation state of the substrate. Similar to how reduction is the acquisition of electrons while oxidation is the loss of electrons or an increase in the oxidation state.
An oxidation process takes place when oxygen interacts with a substance or an element. Another way to think of oxidation is as the process of removing hydrogen from the species of reactants. Molecule, atom, or ion oxidation is the process of losing electrons.
Because they generate new functional groups in molecules or alter existing functional groups, oxidation processes are crucial in the synthesis of organic substances.
Thus, the iodine atom also experiences a change. The iodide atom gets one electron during the reaction with potassium, leaving it with eight electrons at its outer energy level.
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what are some chemical properties of lead besides it’s melting and boiling points
Answer:
Atomic mass. 207.2 g.mol -1. Electronegativity according to Pauling. 1.8. Density. 11.34 g.cm-3 at 20°C. Melting point. 327 °C. Boiling point. 1755 °C.
Explanation:
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