Atomic structure and bonding - Jamb Chemistry Past Questions and Answers

Question 116:

• JAMB 2005

An element wil readily form an electrovalent compound if it electron configuration is

A. 2, 8, 1
B. 2, 8, 4
C. 2, 8, 8
D. 2, 8, 5

Question 117:

• JAMB 2005

What is the valence shell electron configuration of the element with atomic number 17?

A. 1s² 2s² 2p⁶ 3s² 3p⁴
B. 1s² 2s² 2p⁶ 3s² 3p⁵
C. 2s² 2p⁶
D. 3s² 3p⁵

Question 118:

• JAMB 2005

When pure aluminium metal is heated to red hot in the presence of nitrogen gas, the compound formed is

A. Al₂N
B. Al₂N₂
C. AlN
D. Al₂N₃

Question 119:

• JAMB 2005

A dense white fume is formed when ammonia gas reacts with

A. O_2(g)
B. H_2(g)
C. Cl_2(g)
D. HCl_(g)

Question 120:

• JAMB 2005

The most abundant element on the earth's crust is

A. Nitrogen
B. Hydrogen
C. Oxygen
D. Flourine