Question

Choose the correct answer from the options given below:

i. In the element 11Na23, 11 represents:

A) Mass number B) Atomic number

C) number of neutrons D) none of the above

ii. According to Boyle’s law, as the pressure increases, the volume:

A) Increases B)Decreases

C) Remains the same D) first increases and then decreases

iii. The valency of an element having 8 electrons in the valence shell is:

A) 5 B)2

C)8 D)3

iv. An element having electronic configuration 2,8,1 belongs to the period:

A) 2 B) 3

C)1 D) 8

v. The group whose elements are most electronegative:

A) 1 [IA] B) 2 [II A]

C) 16 [IV A] D) 17 [VII A]​

Answer 1

Answer:

i-Atomic number

ii- decrease

iii- 8

iv- 1

v- D

Answer 2

Answer:

+1

Explanation: