CBSE - Structure of the Atom

1 Structure of the Atom 

The isotope used in the treatment of cancer of .......

(1) Iodine
(2) Cobalt
(3) Carbon
(4) Hydrogen

2 Structure of the Atom 

The electronic configuration of an ion M⁺²  is 2,8, 14. If its mass number is 56 the number of neutrons in its nucleus is -

(1) 30
(2) 32
(3) 34
(4) 42

3 Structure of the Atom 

The maximum number of electrons that can be accomodated in the 'L' shell of an atom is .....

(1) 2
(2) 4
(3) 8
(4) 16

4 Structure of the Atom 

Rutherford' s alpha particle scattering experiment was responsible for discovery of

(1) Electron
(2) Atomic nucleus
(3) Proton
(4) Neutron

5 Structure of the Atom 

The quantum number which explain about size and energy of the orbit or shell is ......

(1) Principle quantum number.
(2) Angular momentum quantum number.
(3) Magnetic quantum number.
(4) Spin quantum number.

6 Structure of the Atom 

An atom of an element (X) has it s K, L, and M shells f illed with some electrons. It reacts with sodium metal to form a compound NaX. The number of electrons in the M shell of an atom of element (X) will be

(1) 7
(2) 8
(3) 2
(4) 1

7 Structure of the Atom 

The number of neutrons in an atom of  is

(1) 23
(2) 11
(3) 34
(4) 12

8 Structure of the Atom 

The number of protons, neutrons and electrons in four elements a, b, c and d are as follows :
(a) p = 6, n = 6, c = 6 
(b) p = 6, n = 7, c = 6 
(c) p = 18, n = 22, c = 18 
(d) p = 19, n = 21, c = 19 

In these : 
(1) Element a and b are isotopes and element c and d are isobars. 
(2) Element a and b are isotopes but element c and d are not isobars. 
(3) Element a and b are isobars and element c and d are isotopes. 
(4) Element a and b are isobars but element c and d are not isotopes.