Question

S
E. Tick () the most appropriate answer.
1. The isotopes of a same element have :
(a) same mass number
(b) same atomic number
(c) different mass number
(d) (b) and (c) both
2. The electronic configuration of sodium
[23Na) is :
(a) 2, 8, 8, 6
(b) 2, 8, 1
(c) 2,9
(d) 2, 18,4
3. With the exception of helium all noble gases
have
electrons in their valence
shell.
(a) 2
(b) 18
(C) 8
(d) 32
4. The maximum number of electrons in
L-shell are
(a) 2
(b) 32
(c) 18
(d) 8
alomont having different​

Answer 1

Answer:

1 ans. same atomic no.

2 ans. 2,8,8,6

3 . 8

4. ans is ,,,8