Atomic structure and bonding - Jamb Chemistry Past Questions and Answers

Question 6:

• JAMB 2019

In order to remove one electron from a 3S orbital of gaseous sodium atom, about 496KJMol^-1 of energy is required. This energy is referred to as

A. Electron affinity
B. Ionization energy
C. Activation evergy
D. Electronegativity

Question 7:

• JAMB 2019

1s², 2s², 2p⁶, 3s², 3p⁶, 3d⁷, 4s²
An element with the electronic configuration above is a

A. Non-metal
B. Metal
C. Transition element
D. Group two element

Question 8:

• JAMB 2019

Given that electronegativity increases across a period and decreases down a group in the periodic table, in which of the following compounds will the molecules be held together by the strongest hydrogen bond?

A. HF_(g)
B. NH_3(g)
C. Ch_4(g)
D. HCl_(g)

Question 9:

• JAMB 2019

How many electrons will be found in the nucleus of an atom with mass number 23 and 17 neutrons?

A. None
B. 6
C. 7
D. 8

Question 10:

• JAMB 1978

The periodic classification of elements is an arrangement of the elements in order of their

A. Atomic Weights
B. Isotopic Weights
C. Molecular Weights
D. Atomic Numbers
E. Atomic Masses