valency of zinc with diagram.
(atomic no. of zinc is 30)
Answers
Answer:
You take a look at its electron configuration.
Explanation:
Zinc is located in period 4, group 12 of the periodic table and has an atomic number equal to 30.
This means that neutral zinc atom has a total of 30 electrons surrounding its nucleus. To see how many of these electrons are valence electrons, write the electron configuration of a neutral zinc atom.
Zn
:
1
s
2
2
s
2
2
p
6
3
s
2
3
p
6
4
s
2
3
d
10
or, if you use the noble gas shorthand notation
Zn
:
[
Ar
]
4
s
2
3
d
10
Notice that the outermost shell, which for zinc is the fourth shell,
n=4
, has two electrons.
This means that zinc can lose the two electrons located in the 4s-orbital to be become the
Z
n
2
+
cation.
Zn
2
+
:
[
Ar
]
3
d
10
Notice that the 3d-orbital is completely filled, which means that these electrons behave like core electrons and cannot be considered valence electrons.
Therefore, zinc has only 2 valence electrons, both located in the 4s-orbital.
2 is the velancy of zinc and zinc loose electron to complete neighbours nobel gas configuration .
Lewis structure diagram
: Zn