Atomic number of any atom is equal to the number of………
a) Protons
b) Electrons
c) Neutrons
d) a & b both
Which element has atomic number eleven ?
a) Sodium
b) Carbon
c) Chlorine
d) Oxygen
One carbon is …times heavier than Hydrogen
a) 12
b) 13
c) 14
d) 15
Mass number is also called ……… number.
a) atomic
b) nucleon
c) molecular
d) atomicity
Mass number is represented by………….
a) A
b) Z
c) M
d) n
Which one of the following is mass number of potassium ‘K’ ?
a) 39
b) 40
c) 14
d) 12
