Question

use the electron configurations and the periodic table to answer the questions: which element is this?

Explanation:

Step1: Count the electrons

The 1s orbital has 2 electrons (2 arrows pointing in opposite directions), the 2s orbital has 2 electrons, and the 2p orbital has 3 electrons. So in total, there are 2 + 2+3 = 7 electrons.

Step2: Identify the element

The number of electrons in a neutral atom is equal to its atomic number. An element with atomic number 7 is nitrogen.

Answer:

Nitrogen