Question

18) Read the following table and answer any four questions from 18 (i) to 18 (v). (1x4=4)

Element Protons Neutrons Electrons

P 16 17 16

Q 18 18 18

R 17 18 18

S 17 20 17

i) Element ‘R’ is a

a) Metal b) Non-metal c) Metalloid d) None of these


ii) How many valence electrons are there in ‘P’ ?

a) 8 b) 1 c) 6 d) 2


iii) Which two elements form the pair of isotopes ?

a) P&Q b) Q&R c) R&S d) Q&S


iv) Which one is an anion ?

a) P b) Q c) R d) S


v) What is the valency of ‘Q” ?

a) Zero b) 8 c) 3 d) 2

plz answer it ​

Answer 1

Answer:

question 1= metal

que. 2 =6

QUE. 3= R&S

QUE. 4= S

QUE 5 =ZERO