Question

21. Which of the following is the the characteristic of isotopes?

Possess different atomic number
Possess different mass number
Possess same mass number
Number of proton is different

22. Thompson's plum pudding model had the electrons at

Fixed positions throughout the spherical atom
Varying positions throughout the spherical atom
Fixed positions at the centre of the spherical atom
In closed circular orbits around the nucleus

23. The charge on an electron is

+1.602 x 10⁻¹⁹ C
-1.602 x 10⁻¹⁹ C
6.022 x 10²³ C
-1 C

24. For the element sulphur, the last shell having complete electron occupancy is the

K shell
L shell
M shell
N shell

25. The inference that is not drawn from Rutherford's gold foil experiment is

The atom consists of large empty spaces
Mass of the atom is at its centre called the nucleus
The nucleus contains protons and neutrons
Electrons are revolving around the nucleus​

Answer 1

21. Possess same mass number

22. Not confirm

23. -1.602 x 10⁻¹⁹ C

24. M shell

25. idk sorry I forgot that