Predict the blocks, periods and groups to which following elements belong:
Mg

Explanation

The atomic number of Mg is 12. Its electronic configuration is: Mg(z=12)= `1s^(2), 2s^(2), 2p^(6), 3s^(2)` Block. It belongs to s block, as the differentiating electron enters into 3s subshell. Period. It belongs to third period because the principal quantum number of valence shell is 3. Group: It belongs to group 2, because it is a s-block element and contains 2 electrons in the valence shell.