Question

An element X belongs to the second period and group 16 of the periodic table.
a) Identify the element
b) Is it a metal or nonmetal?
c) What will be the formula of the compound formed by X with sodium?​

Answer 1

Explanation:

ANSWER:-

Given :-

• An element of group 16 and period 2 of Periodic Table.

We need to identify the element.

a) Identify the element.

The element is Oxygen with electronic configuration of 2,6.

b) Is it a metal or nonmetal?

The element is a non metal.

c) What will be the formula of the compound formed by X with sodium?

Na is sodium and Oxygen is O.

So, it will form $\sf{Na_2 O }$ .

Remember that:-

• With electronic configuration, we can determine the period and group.
• The 2,6 which we see of Oxygen, 6+10 will give us the group ( after 2, we need to add 10 to all the valence electrons to determine group as we need not include the transition elements)
• The number of shells ie 2 and 6 gives the period number.

Answer 2

Answer:

Non-metal

Explanation:

It will obviously non-metal because non-metallic character of elements increases on going from left to right in a period.11-Jun-2018