Question

1. an element has an atomic number of 80. how many protons and electrons are in a neutral atom of this element? 80 protons, 80 electrons 160 protons, 80 electrons 40 protons, 40 electrons 80 protons, 0 electrons

Explanation:

Step1: Recall atomic - number definition

The atomic number of an element is equal to the number of protons in the nucleus of an atom of that element. So, if the atomic number is 80, the number of protons is 80.

Step2: Consider charge - neutrality

In a neutral atom, the number of electrons is equal to the number of protons to balance the positive charge of protons. Since there are 80 protons, there are also 80 electrons.

Answer:

80 protons, 80 electrons