Atomic structure and bonding - Jamb Chemistry Past Questions and Answers

Question 31:

• JAMB 1983

The mass of an atom is determined by

A. Its ionization potential
B. Its electrochemical potential
C. The number of protons and electrons
D. The number of neutrons and protons
E. The number of neutrons and electrons

Question 32:

• JAMB 1985

The atomic number of an element whose cation, X²⁺, has the ground state electronic configuration 1s²2s²2p⁶3s²2p⁶ is?

A. 16
B. 18
C. 20
D. 22
E. 24

Question 33:

• JAMB 1985

Figure 1 above shows part of the periodic Table which of the elements belongs to the p-block?

A. S, T and U
B. V, W and X
C. S and T only
D. P, Q and R
E. V, W, X and S

Question 34:

• JAMB 1986

What are the values of x, y and z respectively in the equation: xCu + yHNO₃ → xCu(NO₃)₂ + 4H₂O + zNO?

A. 4: 1: 2
B. 3:8:2
C. 2:8:3
D. 8:3:2

Question 35:

• JAMB 1986

An element with atomic number twelve is likely to be

A. Electrovalent with a velocity of 1
B. Electrovalent with a valency of 2
C. Covalent with a valency of 2
D. Covalent with valency of 4