The maximum number of electrons in 1st is two. This rule is called……..
a) duplet
b) valence
c)octet
d) noble
The maximum number of electrons in 2nd is eight. This rule is called……..
a) duplet
b) valence
c) octet
d) noble
The atomic number of Neon is 10. The number of electrons in its valence shell are……
a) 2
b) 8
c) 10
d) 18
Exercise:
Neutrons carry…….
a) no electric charge
b) positive charge
c) negative charge
d) unit charge
The smallest particle of an element is……….
a) molecule
b) atom
c) cell
d) DNA
