Which among the following atoms will never form a cation by losing electrons
Sodium
Fluorine
Iron
Hydrogen
Which is a good conductor of electricity?
NH3
Solid NaCI
Diamond
Molten KCI
Which one of the following molecules do not have a coordinate covalent bond?
SO3
CO
KCI
NH4+
How many lone pairs are present in oxygen in the H2O molecule
2
1
0
3
Which one of the following do not have an octet valence shell electronic configuration?
O2-
Na+
Ne
S-
Which among the following molecules do not obey octet rule
NaCI
CaO
AICI3
BF3
Atomic no.of P is 15. What is its electronic configuration?
2,6,6,1
2,8,2,3
2,8,5
8,7
How many electrons are present in the valence shell of sulphur?
6
5
7
Which one of the following will easily become an anion?
Al
Li
Ca
F
How many electrons are present in Mg2+ ion?
10
11
12
8
