Question

electron configuration assignment
what is the element is shown by the electron configuration below?
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s²

Explanation:

Step1: Count the total number of electrons

The superscripts represent the number of electrons in each orbital. Add them up: $2 + 2+6 + 2+6 + 2+10 + 6+2=38$.

Step2: Identify the element

The atomic number of an element is equal to the number of electrons in a neutral atom. Looking at the periodic - table, the element with atomic number 38 is strontium (Sr).

Answer:

Sr