The concept of atoms - Jamb Chemistry Past Questions and Answers

Question 11:

• JAMB 1987

An isotope has an atomic number of 17 and a mass number of 36. Which of the following gives the correct number of neutrons and protons in an atom of the isotope?

A. Neutrons 53, Protons 17
B. Neutrons 17, Protons 36
C. Neutrons 19, Protons 17
D. Neutrons 36, Protons 17

Question 12:

• 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 13:

• JAMB 2003

I. H = 1s¹ II. N = 1s² 2s² p³ III. O = 1s² 2s² p⁴ IV. Zn = 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰
From the above, which of the following pairs is like to be paramagnetic?

A. I and II
B. I and III
C. I and IV
D. III and IV

Question 14:

• JAMB 2007

How many electrons are in the L shell of ³¹₁₅P?

A. 5
B. 8
C. 18
D. 2

Question 15:

• JAMB 2010

The maximum number of electrons in the L shell of an atom is

A. 2
B. 8
C. 18
D. 32