Q1) The valency of an element A is 3 and element B is 2. Write the formula of the compound forned by combination of A andB?

1 Answer
Ori Kiko
Apr 5, 2018

#A_2B_3#

Explanation:

You may know that when you combine two atoms, such as #O# and #Fe# you interchange them valencies. #O# is 2, and #Fe# has lots of valecies, but we are going to take #3#, as an example.

So it would be #Fe_2O_3#

You just have to do the same with elements #A# and #B#.
#A# is 3, #B# is 2; so:

#A_2B_3#

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