Atomic structure and bonding - Jamb Chemistry Past Questions and Answers

Question 126:

• JAMB 2006

The idea of planetary electron was that of

A. Rutherford
B. Thompson
C. Bohr
D. Dalton

Question 127:

• JAMB 2007

MnO_2(s) + xHCl_(aq) → MnCl_2(aq) + yH₂O_(l) + zCl_2(g)
In theequation above, what are the values of x, y and z respectively

A. 2, 1, 2
B. 4, 1, 2
C. 4, 2, 1
D. 1, 2, 1

Question 128:

• JAMB 2007

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

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

Question 129:

• JAMB 2007

If the electron configuration of a element is p1s² 2s² 2P⁵, how many unpaired electron are there?

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

Question 130:

• JAMB 2007

the elements that belong to the third period of the periodic table are

A. Li, Be, Al and P
B. Na, P, O and Cl
C. B, C, N and O
D. Nz, Mg, S and Ar