Atomic structure and bonding - Jamb Chemistry Past Questions and Answers

Question 91:

• JAMB 2000

The electron configuration of \(_{22}X^{2+}\) ion is

A. 1s² 2s²2p⁶ 3s² 3p⁶ 4s² 3d²
B. 1s² 2s²2p⁶ 3s² 3p⁶ 4s² 3d¹
C. 1s² 2s²2p⁶ 3s² 3p⁶
D. 1s² 2s²2p⁶ 3s² 3p⁶ 4s²

Question 92:

• JAMB 2000

The distance between the nuclei of chlorine atoms in a chlorine molecule is 0.194 mm. The atomic radius of chlorine atom is

A. 0.097 mm
B. 0.194 mm
C. 0.388 mm
D. 2.388 mm

Question 93:

• JAMB 2000

A phenomenon where an element exist in different forms in the same physical state is known as

A. Isomerism
B. Amorphism
C. Allotropy
D. Isotopy

Question 94:

• JAMB 2001

A particle that contains 9 protons, 10 neutrons and 10 electrons is a

A. Negative ion
B. Positive ion
C. Neutral atom of non-metal
D. Neutral atom of a metal

Question 95:

• JAMB 2001

Millikan's contributions to the development of atomic theory is the determination of

A. Charge on electron
B. Positive rays
C. Charge to mass ratio
D. Cathode rays