Write two example of element witch valence
Answers
valency-2
Carbon
Valency-4
The valence electrons are the electrons that determine the most typical bonding patterns for an element.
These electrons are found in the s and p orbitals of the highest energy level (row of the periodic table) for the element.
Using the electron configuration for each element we can determine the valence electrons.
Na - Sodium
1
s
2
2
s
2
2
p
6
3
s
1
Sodium has 1 valence electron from the 3s orbital
P - Phosphorus
1
s
2
2
s
2
2
p
6
3
s
2
3
p
3
Phosphorus has 5 valence electrons 2 from the 3s and 3 from the 3p
Fe - Iron
1
s
2
2
s
2
2
p
6
3
s
2
3
p
6
4
s
2
3
d
6
Iron has 2 valence electrons from the 4s
Br - Bromine
1
s
2
2
s
2
2
p
6
3
s
2
3
p
6
4
s
2
3
d
10
4
p
5
Bromine has 7 valence electrons 2 from the 4s and 5 from the 4p
you can count the electrons in the outermost shell
I hope this was helpful.