Question

which of the following best describes the atomic structure of bromine? o 80 protons and 80 neutrons in the nucleus, and 35 electrons outside the nucleus o 35 protons and 35 neutrons in the nucleus, and an average of 80 electrons outside the nucleus o 35 protons outside the nucleus, and an average of 45 neutrons and 35 electrons outside the nucleus o 35 protons and an average of 45 neutrons in the nucleus, and 35 electrons outside the nucleus

Explanation:

Step1: Recall atomic structure basics

Protons and neutrons are in the nucleus, electrons are outside. For bromine, atomic number is 35 which means 35 protons.

Step2: Consider neutron - proton ratio

Bromine has an average of 45 neutrons in its nucleus. And number of electrons (35) equals number of protons in a neutral atom.

Answer:

35 protons and an average of 45 neutrons in the nucleus, and 35 electrons outside the nucleus