Which statement best describes how atoms combine to form sodium chloride (NaCl)?
2 answers:
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 . Whereas chlorine at the same time will take up one electron from sodium atom and acquire a negative charge as
.
Thus, we can conclude that the statement 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.
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 :
act as an oxidizing agent.
The oxidation number of N in is calculated as:
(+1)+(x)+3(-2) = 0
x = +5
And the oxidation number of N in is calculated as:
(+1)+(x)+2(-2) = 0
x = +3
From the oxidation number method, we conclude that the oxidation number reduced this means itself get reduced to
and it can act as an oxidizing agent.
act as a reducing agent.
The oxidation number of O in is calculated as:
(+1)+(+5)+3(x) = 0
x = -2
The oxidation number of O in is Zero (o).
Now, we conclude that the oxidation number increases this means itself get oxidized to
and it can act as reducing agent.