The concept of atoms - Jamb Chemistry Past Questions and Answers

Question 1:

• JAMB 2019

The nucleus of an atom contains

A. Protons only
B. Neurons only
C. Protons and electrons
D. Neutrons and electrons
E. Protons and neutrons

Question 2:

• 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 3:

• JAMB 1978

The nucleus of an atom contains

A. Protons only
B. Neurons only
C. Protons and electrons
D. Neutrons and electrons
E. Protons and neutrons

Question 4:

• JAMB 1979

Helium atoms are chemically unreactive because

A. There are no electrons around the nucleus
B. The number of protons equals the number of electrons
C. There are equal number of protons and neutrons in the nucleus
D. The outer electron shell is completely filled
E. The atoms contain only protons

Question 5:

• JAMB 1980

Element X has a total of 19 electrons and can react with oxygen to form an oxide. Which of the following statements is NOT true of the oxide of the element?

A. When exposed to air, it slowy changes to liquid
B. Its solution in water conducts electricity
C. Its solution in water, on evaporationm gives a white solid
D. Its solution in water liberates hydroge when in contact with aluminium metal
E. Its oxide, when stronlgy heated, regenerates the elements X