Question

use the electron configurations and the periodic table to answer the questions: which element is this? which element is this? nitrogen (n) done complete 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁵

Explanation:

Step1: Count total electrons

The electron - configuration $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{10}4p^{5}$:
$2 + 2+6 + 2+6 + 2+10 + 5=35$.

Step2: Identify element by atomic number

The atomic number of an element is equal to the number of electrons in a neutral atom. The element with atomic number 35 is bromine (Br).

Answer:

bromine (Br)