The periodic table and periodicity of elements - Jamb Chemistry Past Questions and Answers

Question 36:

• JAMB 2010

Moving from left to right across a period, the general rise in the first ionization energy can be attributed to the

A. Decrease in nuclear charge
B. Increase in nuclear charge
C. Decrease in screening effect
D. Increase in screening effect

Question 37:

• JAMB 2010

How many unpaired electron(s) are there in the nitrogen sub-levels/

A. 3
B. 2
C. 1
D. None

Question 38:

• JAMB 2010

Elements in the same period in the periodic table have the same

A. Number of shells
B. Atomic number
C. Chemical properties
D. Physical properties

Question 39:

• JAMB 2011

Which of the following questions is correct about the periodic table?

A. The non-metallic properties of the elements tend to decrease across each period
B. The valence electrons of the elements increase progressively across the period
C. Elements in the same group have the same numbeer of electron shells
D. Elements in the same period have the number of valence electrons

Question 40:

• JAMB 2015

The above orbital diagram shown the electronic configuration of

A. Chlorine
B. Nitrogen
C. Calcium
D. Neon