Irrational Numbers

Q.

What property do all elements in the same column of the Periodic Table as boron have in common?

Q. There is an element X with atomic number 16.To which group in the periodic table does this element X belong to?

1. The element belongs to the 14th group.
2. The element belongs to the 16th group.
3. The element belongs to the 13th group.
4. The element belongs to the 15th group.