Question

In the modern periodic table, the block indicates the value of `………………` for the last subshell that received electrons in building up the electronic configuration. Fill in the blank with appropriate option
A. Atomic number
B. Aximuthal quantum number
C. Principal quantum number
D. Atomic mass

Answer 1

Correct Answer - 2
The block indicates value of azimuthal quantum number `(l)` for the last sub`-` shell that received electrons in building up the electronic configuration. For examples group 1 and group 2 elements belong to `s-` block as last electron enters in `s-` subshell.