Atomic structure and bonding - Jamb Chemistry Past Questions and Answers

Question 216:

• JAMB 2020

The electronic configuration of an element is 1S\(^2\) 2S\(^2\) 2P\(^6\) 3S\(^2\) 3P\(^3\). How many unpaired electrons are there in the element?

A. 5
B. 4
C. 3
D. 2

Question 217:

• JAMB 2020

Four elements P, Q, R and S have atomic numbers of 4, 10, 12 and 14 respectively. Which of these elements is noble gas?

A. P
B. Q
C. R
D. S

Question 218:

• JAMB 2020

The shape of ammonia molecule is?

A. Trigonal planar
B. Octahedral
C. Square planar
D. Tetrahedral

Question 219:

• JAMB 2020

Which of the following types of bonding does not involve the formation of new substances?

A. Metallic
B. Covalent
C. Co-ordinate
D. Electrovalent

Question 220:

• JAMB 2020

An electron can be added to a halogen atom to form a halide ion with?

A. 8 valence electrons
B. 7 valence electrons
C. 2 valence electrons
D. 3 valence electrons