Give the electronic configuration of oxygen. Also mention the period and the group to which the element belongs.

" 3.Write the period and group to which Mg element belongs "

(a) Atomic numbers of Mg and Al are 12 and 13 respectively. Write their electronic configuration. (b) Mention the period of the Modern Periodic Table to which the above two elements belong. Give reason for your answer.

Write the electronic configuration of the element present in the third period and seventeenth group of the periodic table.

Two elements X and Y have atomic numbers 19 and 17 respectively. Give their electronic configuration. To which period and group of modern periodic table do these two elements belong? What type of bond will be formed between them? Also give the chemical formula of the compound formed.

If the electronic configuration of an element is 2,8,2, to which period of the Modem Periodic Table does it belong?

Following are the valence sheel electronic configurations of some elements. Find out the blocks to which they belong in the periodic table?