Question

0. 2. Rewrite the following statements selecting the correct options :
(1) The symbol A is used to denote the ...
(a) atomic number (b) atomic radius (c) atomic mass number (d) atomic mass
(2) The existence of isotopes is due to the presence of different number of
(a) electrons
(b) protons
(c) neutrons
(d) positrons
(3) In the nucleus of a sodium atom (1Na), there are ......... neutrons.
(a) 11
(b) 12
(c) 10
(d) 9
(4) Isotopes of an element have the same number of .....
(a) neutrons
(b) nucleons
(c) electrons
(d) atoms
(5) The great Indian philosopher .....
- proposed that matter is made up
tiny particles.
(a) Aryabhatta (b) Kanad
(c) Bhaskaracharya (d) Chanak
(6) The maximum capacity of the M shell is ......... electrons.
(a) 2
(b) 8
(c) 18
(d) 32
(7) The mass of the electron is ......... times less than that of a hydrogen atom.
(a) 1800
(b) 8100
(c) 1550
(d) 1600
(8) The L shell is the valence shell in
(a) hydrogen
(b) chlorine
(c) oxygen
(d) sodium​

Answer 1

Answer:

(1)a

(2)nutrouns

(3)11

(4)electrons

(5) Aryabhatta

(6)18

(7)1800

(8) soudim