Question

Read the following and answers any four questions from 18 (i) to (v)

The properties of the elements which change periodically with atomic number are called periodic or atomoic properties such as

valency, metallic character , atomic radius, etc.

On moving from top to bottom in any group, atomic radius increases and as we move from left to right along a period, atomic

radius decreases.

(i) Which is the periodic property of an element? (1)

(a) Atomic weight (b) Atomic radius (c) Refractive index (d) None

(ii) In the modern periodic table there are ………. groups. (1)

(a) 7 (b) 18 (c) 17 (d) 4

(iii) The modern periodic table is based upon: (1)

(a) Modern periodic law (b) Atomic number (c) Atomic weight (d) None

(iv) As we move from top to bottom in any group , atomic radius: (1)

(a) increases (b) decreases (c) remain same (d) no regular trend

(v) Which of the following atomic properties ? (1)

(a) valency (b) metallic character (c) atomic radius (d) All of these​

Answer 1

Answer:

i.b

ii.b

iii.a

iv.a

v.d

Explanation:

Hope it helps you