Question

How many protons, neutrons, and electrons are there in a neutral atom of the isotope of antimony named antimony-121?

a) Protons: 51, Neutrons: 70, Electrons: 51
b) Protons: 51, Neutrons: 70, Electrons: 70
c) Protons: 121, Neutrons: 51, Electrons: 51
d) Protons: 70, Neutrons: 51, Electrons: 70

Answer 1

In a neutral atom of the isotope antimony-121, there are 51 protons, 70 neutrons, and 51 electrons.

Step-by-step explanation:

In a neutral atom of the isotope antimony-121, there are 51 protons, 70 neutrons, and 51 electrons. The number of protons determines the element and atomic number, while the number of neutrons determines the isotope of the element. The number of electrons is equal to the number of protons in a neutral atom.