1(viii)
The table below shows the atomic numbers of elements W, X, Y and Z.
| Element | Atomic Number |
|---|---|
| W | 4 |
| X | 13 |
| Y | 7 |
| Z | 10 |
Which of the above elements will combine to form an electrovalent compound?
- (a)Y and Z
- (b)C and Z
- (c)X and Y
- (d)X and W
Show SolutionHide Solution↓
X and Y
Reason — An electrovalent (ionic) compound is formed between a metal and a non-metal. X (atomic number 13, configuration 2, 8, 3) is a metal that loses 3 electrons to form X3+, and Y (atomic number 7, configuration 2, 5) is a non-metal that gains 3 electrons to form Y3-. They combine to form an electrovalent compound (XY). Z (atomic number 10) is a noble gas and does not form compounds.