Element having variable valency 1 and 3?
1 Answer
Thallium and gold have valencies of 1 and 3.
Explanation:
Thallium
Thallium is about 170 times as abundant as gold in the Earth's crust.
The electron configuration of thallium is
It is easy to remove the
The
Removal of these electrons gives
Thus, some common compounds of thallium are:
- thallium(I) sulfide
#"Tl"_2"S"# , - thallium(I) sulfate
#"Tl"_2"SO"_4# - thallium(III) fluoride
#"TlF"_3# - thallium(III) oxide
#"Tl"_2"O"_3#
Gold
The electron configuration of gold is
It is easy to remove the
The
Another common state of gold is
Thus, the most common compounds of gold are
- gold(I) chloride
#"AuCl"# - gold(III) chloride
#"AuCl"_3# - chlorauric acid
#"HAuCl"_4#
Here's a table giving the most common oxidation numbers of the elements in their compounds.
