1.
Physical matter is a measure of inertia, the resistance a body feels to a change in speed or position.
2.
The fundamental unit of a chemical element.
3.
The positively charged central core of an atom, consisting of protons and neutrons and containing nearly all its mass
4.
A subatomic particle in all atomic nuclei with positive electric charge equal in magnitude to that of an electron, but of opposite sign.
5.
A subatomic particle of about the same mass as a proton but without an electric charge, present in all atomic nuclei except those of ordinary hydrogen.
6.
A subatomic particle with negative charge that surrounds the nucleus of an atom and also carries electricity in solids.
7.
Areas around the nucleus where a particular electron resides, each holding a maximum of two electrons with opposite spin.
8.
A chemical element with the same number of protons but different numbers of neutrons.
9.
An atom or molecule with a net electric charge due to the loss or gain of an electron.
10.
A property for an object to feel a repulsive or attractive electric force where positive charges repel and opposite charges attract.
11.
A solid material made of atoms arranged in a geometric pattern.
12.
Provides the number of wavelengths that pass by a fixed point over one second of time.
13.
High-energy photons generated by radioactive decay.
