Question

Answer the follwing questions based on table
(i) The element R is a

a) metal b) non-metal c) metalloid d) none of these

(ii) What is the electronic configuration of element P?

a) 2,8,7 b) 2,8,8,1 c) 2,8,9 d) 1,8,8,1

(iii) Which two elements form a pair of isobars?

a) R and S b) R and P c) S and Q d) P and Q
(iv) Which of the following statement is correct?

a) The sum of number of electrons and protons is equal to the mass

number.

b) The sum of number of electrons and protons is equal to the atomic

number.

c) The sum of number of neutrons and electrons is equal to the atomic

number.

d) The sum of number of neutrons and protons is equal to the mass

number.

(v) Which is the correct increasing order of atomic number?

a) R = S < P < Q b) P + Q < R < S

c) R < Q = S < P d) R < P = Q < S




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Answer 1

Answer:

R is Chlorine.

1. Non metal.

2. 2,8,7.

3. S and Q.

4. D.

5. a.

Answer 2

Answer:

R is chlorine

1 metal

2 2,8,8,1

3 p&q

4 d

5 a