Answer:
The basic building blocks that make up matter are called atoms.
A chemical element is a substance that contains only one type of atom. If a substance contains more than one type of atom, it is a compound. ... The smallest particle of such an element is an atom. Atoms are made up of protons, neutrons, and electrons.
Isotopes are atoms of the same element containing the same number of protons and electrons but different numbers of neutrons.
Explanation:
The most appropriate and correct answers to complete each paragraph respectively are:
1. An atom refers to the smallest, indivisible unit made up of matter and forms all chemical elements.
This ultimately implies that, the fundamental building blocks of matter are called: atoms.
2. A substance that is made up of the same kind of atoms is called an: element. Some examples of an element are:
3. Unstable elements lose particles because their nucleus have an excess of internal energy (neutron or proton). Thus, this makes them radioactive.
Some examples of an unstable element are:
Find more information: https://brainly.com/question/18214726
