Question

use the periodic table block to identify or calculate the information listed below. number of electrons number of protons number of neutrons element symbol

Explanation:

Step1: Recall atomic number property

For a neutral atom, number of electrons = atomic number. Atomic number of Br is 35, so number of electrons = 35.

Step2: Recall proton - atomic number relation

Number of protons = atomic number. Atomic number of Br is 35, so number of protons = 35.

Step3: Calculate number of neutrons

Mass number ≈ 79.90 (approx 80). Number of neutrons = mass number - number of protons. So number of neutrons = 80 - 35 = 45.

Step4: Identify element symbol

From the periodic - table block, element symbol is Br.

Answer:

Number of electrons: 35
Number of protons: 35
Number of neutrons: 45
Element Symbol: Br