Question

Match the atoms which might substitute for one another. Match the items in the left column to the items in the right column.
1. Si Na
2. K V
3. Nb C
4. Cu Ag
5. P Ca
6. Mg As

Answer 1

Alright the way to go about this question is to look at the periodic table. An element might substitute for another element if it is from the same family/column on the periodic table for example K might replace Na.

Answer 2

oh ok thanks now i get it