Question

The electron configuration of element x is 1s2 2s2 2p3. The atomic number of the element just below x is

Answer 1

the atomic nor below this is 6 which is carbon

Answer 2

Explanation:

To write the notation of an atom, we need to know the symbol of the element, the atomic number and the mass number. The mass number of the atom goes above the symbol and the atomic number is written as a subscript.