Question

An element has its electron configuration as 2,8,2. Now answer the following questions.
a. What is the atomic number of this element?
b. What is the group of this element?
c. To which period does this element belong?
d. With which of the following elements would this element resemble? (Atomic numbers are given in the brackets) N (7), Be (4) , Ar (18), Cl (17)

Answer 1

In periodic table, the atomic number of nitrogen is 7. It belongs to the group 15 of the periodic table. One of the most important aspects of the element is that they are non metals.

They have the capability to gain electrons which is quite opposite to that of the alkali metals. The latter have the propensity to lose electrons as quickly as possible.

Chlorine belongs to the seventh group as it requires only one electron to gain stable electronic configuration.