Elementary Modern Physics - Jamb Physics Past Questions and Answers

Question 156:

• JAMB 2017

An element and its isotope only differ in the number of

A. Protons
B. Electrons
C. Ions
D. Neutrons

Question 157:

• JAMB 2017

It is known that a neutron exists in a light atomic nucleus
Which of the following also exists in the nucleus?

A. An electron
B. A β - particle
C. β - particle
D. Proton

Question 158:

• JAMB 2017

If silicon is doped with phosphorus, what type of semiconductor material will be formed?

A. Zener material
B. P-n junction
C. N-type
D. P-type

Question 159:

• JAMB 2017

Which of the following representations is correct for an atom X with 28 electrons and 30 neutrons?

A. \(^{58}_{28}X\)
B. \(^{30}_{28}X\)
C. \(^{28}_{30}X\)
D. \(^{58}_{30}X\)

Question 160:

• JAMB 2018

Natural radioactivity consists of the emission of

A. α- particles and β-rays
B. α- particles and X-rays
C. α- particles, β - rays and g-rays
D. γ- rays and X-rays