Question

silicon sodium nitrogen potassium Use the periodic table to predict which element is nonmetallic AND a gas at room temperature.

Answer 1

In a periodic table metals are placed on the left and it transitions to non metallic elements moving towards the right of the table.

Arranging the elements according to the periodic table moving from left to right, we have

Sodium, Potassium, Silicon, Nitrogen

Here nitrogen is the element present right most in the periodic table, so it the non-metal of the list.

Also, of the four elements, nitrogen is the one in gaseous state.

Therefore  Nitrogen is nonmetallic and a gas at room temperature.