How many electrons are there in the outermost shell of an oxygen atom?
2
4
6
8
How many electron pairs are shared in the formation of oxygen molecule?
1
3
The electronic distribution of nitrogen atom is 2,5. To attain stability, how many electrons does nitrogen need?
5
7
In CCl4, how many covalent bond does Carbon form?
In the following chemical reaction which is the oxidizing agent?
Zn + 2HCl → ZnCl2 + H2
Zn
HCl
ZnCl2
H2
Which loses electrons in a chemical reaction ?
Non-metals
Inert gases
Metals
Halogens
Which one is a non polar molecule?
HF
H2O
NH3
CH4
Electronic configuration of Neon is
2, 8
2, 8, 8
2, 8, 18
Which of the following elements does not lose an electron easily?
Mg
Na
K
Cl