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Dennis_Churaev [7]
2 years ago
10

What element contains 7 protons and 5 valence electrons?.

Chemistry
1 answer:
kow [346]2 years ago
6 0

Answer:

D) The element is nitrogen (N), and it is not very reactive

Explanation:

Given that the atomic number or proton number of Nitrogen, hence it can be concluded that the statement correctly identifies NITROGEN.

Also, considering that the quantity of electrons in the outermost shell of an atom specifies its reactivity, and the higher the number of electrons or electron shells, the lower the level of reactions because they are less likely to gain an electron.

Hence, it can also be concluded that, with 5 valence electrons, nitrogen is not very active

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3 years ago
What is the maximum most that can be extracted from 76 g og Cr2O3.
tiny-mole [99]

Answer:

D) 152 g

Explanation:

a mass of 1 mol Cr2O3 = 2 × 52 + 3 × 16 = 152 g number of moles of Cr2O3.

7 0
3 years ago
Which option states the principle behind the law of conservation of mass and the law of conservation of energy?
jeka94

Answer:

A

Explanation:

The law of conservation of mass states that matter can never be created nor destroyed but can be converted from one form to another.

The law of conservation of energy posits that energy cannot be created nor destroyed but can be converted from one form to another.

These laws are the basic laws of existence. Although the laws have been adjusted, they still form the basic principle behind several scientific laws and are responsible for a whole lot of scientific advancements.

While the first law focuses on matter and the content of matter in a body, the second law basically focuses on energy. The second law serves to support the inter convertibility behind the several forms or types of energy.

For example, to do many useful work at home, it is found that energy is converted from its electric form to say heat in an electric iron to press our clothes.

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7 0
3 years ago
De, it
allsm [11]

If u click on all of them it gives u an A+ and doesn’t even read what u wrote. So u never really have to try hard on the writing parts just tell them u included them all

4 0
3 years ago
Which of the following best describes a non metal
Andre45 [30]

Answer:

-a nonmetal is a substance that lacks the characteristics of a metal.

-Seventeen elements are generally classified as nonmetals: most are gases (hydrogen, helium, nitrogen, oxygen, fluorine, neon, chlorine, argon, krypton, xenon and radon); one is a liquid (bromine); and a few are solids (carbon, phosphorus, sulfur, selenium, and iodine).

6 0
3 years ago
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