The maximum number of electrons in fourth orbit N is………
a) 32
b) 18
c) 8
d) 2
Number of protons in a carbon atom is……
a) 6
b) 11
c) 12
d) 10
Number of protons and electrons in an atom is
a) Different
b) Same
c) Average
d) Constant
Size of single atom is…………...
a) 1nm
b) 0.1nm
c) 0.11nm
d) 1.0nm
Total no of protons or electrons in atom of each element is called it’s…………………
a) Atomic number
b) Atomic mass
c) Molecular mass
d) none of these
Atomic number is denoted by……….
NTS PST 15/12/2019 (8:30)
a) A
b) Z
c) X
d) At
