Question

The table shows the total number of electrons in Atom A and Atom B.

Atom Number of Electrons
A 11
B 17


Which statement is correct?

A. A will give up electrons to form bonds.
B. B will give up electrons to form bonds.
C. Both A and B will be chemically unreactive.
D. Both A and B will gain electrons to become stable

Answer 1

Answer:

C. Both A and B will be chemically unreactive.

Explanation:

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Answer 2

Using the K, L, M, N electronic configuration, both Atoms A and B do not have a full valence electron, hence, Both A and B will be chemically unreactive.

Atom A :

Number of electrons = 11

K - shell = 2

L - shell = 8

M - shell = 1 (valence shell is not complete)

Atom B :

Number of electrons = 17

K - shell = 2

L - shell = 8

M - shell = 7 (valence shell is not complete)

• Atom A will give up electron to attain stability

• Atom B will gain electron to attain stability

Therefore, Atoms A and B are chemically unreactive as they do not have a full valence electron.

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