Question

8/20 each element is made up of only one kind of molecule neutron atom electron

Explanation:

To determine the correct answer, we recall the definition of an element in chemistry (a subfield of Natural Science). An element is a pure substance consisting of only one type of atom. A molecule can be made of multiple atoms (even of the same element, but elements are defined by their atoms). A neutron is a subatomic particle, and an electron is also a subatomic particle. So the element is made of one kind of atom.

Answer:

C. atom (assuming the options are labeled A. molecule, B. neutron, C. atom, D. electron; if the third option is "atom" as per the visual, the correct choice is the third option labeled "atom")