Question

An element belongs to group B and 2nd period of the periodic table. Its atomic number
will be
​

Answer 1

Element is Beryllium, Atomic number is 4

Answer 2

Answer:

The atomic number is 4. The element is Beryllium.

Explanation:

Group B : It's the 2nd group   ------> 2

Period 2: It's the 2nd period   ------> 2

Hence, 2+2 = 4.

Therefore, the atomic number is 4, Element is Beryllium(Be)