Atomic structure and bonding - Jamb Chemistry Past Questions and Answers

Question 186:

• JAMB 2016

An isotope has an atomic number of 15 and a mass number of 31. The number of proton it contains is

A. 16
B. 15
C. 31
D. 46

Question 187:

• JAMB 2017

The shape of the S-orbital is

A. Elliptical
B. Spiral
C. Circular
D. Spherical

Question 188:

• JAMB 2017

\(^{226}_{88}Ra\) → \(^x_{86}Rn\) + alpha particle

A. 226
B. 220
C. 227
D. 222

Question 189:

• JAMB 2017

The shape of ammonia molecules is

A. Trigonal planar
B. Octahedral
C. Square planar
D. Tetrahedral

Question 190:

• JAMB 2017

The mass of silver deposited when a current of 10A is passed through a solution of silver salt for 4830s is — (Ag = 108 F = 96500(mol-1)

A. 54.0g
B. 27.0g
C. 13.5g
D. 108.0g