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jeka57 [31]
4 years ago
5

Which statement best describes how atoms combine to form sodium chloride (NaCl)?

Chemistry
2 answers:
erik [133]4 years ago
7 0

Answer: Option (D) is the correct answer.

Explanation:

A bond generated after transfer of an electron from one atom to another is known as an ionic bond. And, a bond generated by sharing of electron(s) between two atoms is known as a covalent bond.

Sodium is a metal with atomic number 11 and electronic distribution 2, 8, 1. On the other hand, chlorine is a non-metal with atomic number 17 and electronic distribution 2, 8, 7.

So, in order to attain stability sodium will lose one electron and develop a positive charge as Na^{+}. Whereas chlorine at the same time will take up one electron from sodium atom and acquire a negative charge as Cl^{-}.

Thus, we can conclude that the statement a positively charged sodium ion and a negatively charged chlorine ion form an ionic bond.

Murljashka [212]4 years ago
5 0

The answer is D. A positively charged sodium Ion and a negatively charged chlorine ion form an ionic bond.

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Answer : The oxidizing element is N and reducing element is O. 

KNO_{3} is act as an oxidizing agent as well as reducing agent.

Explanation :

An Oxidizing agent is the agent which has ability to oxidize other or a higher in oxidation number.

Reducing agent is the agent which has ability to reduce other or lower in oxidation number.

The given reaction is :

KNO_{3} \rightarrow KNO_{2} +O_{2}

KNO_{3}  act as an oxidizing agent.

The oxidation number of N in KNO_{3} is calculated as:

(+1)+(x)+3(-2) = 0

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And the oxidation number of N in KNO_{2}  is calculated as:

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x = +3

From the oxidation number method, we conclude that the oxidation number  reduced this means KNO_{3} itself get reduced to KNO_{2} and it can act as an oxidizing agent.

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