Chemistry Definitions

Question 1

The smallest unit that makes up an element

Answer 1

Atom

Question 2

The central and most dense part of an atom that is made up of protons and neutrons

Answer 2

Nucleus

Question 3

A positively charged particle found in the nucleus of an atom

Answer 3

Proton

Question 4

An uncharged particle found in the nucleus of an atom

Answer 4

Neutron

Question 5

A negatively charged particle orbiting the nucleus of an atom

Answer 5

Electron

Question 6

A subatomic particle that make up protons, neutrons and electrons

Answer 6

Quark

Question 7

A group of two or more atoms held together using chemical bonds

Answer 7

Molecule

Question 8

A type of atoms that have one electron for their valence shell

Answer 8

Alkali metals

Question 9

A type of atoms that have a full valence shell, making them unreactive

Answer 9

Noble gases

Question 10

A positively charged ion

Answer 10

Cation

Question 11

A negatively charged ion

Answer 11

Anion

Question 12

The outermost shell of an atom/ion that contains the valence electrons

Answer 12

Valence Shell

Question 13

The electrons that make up the outermost shell and contains one or more atoms

Answer 13

Valence Electron

Question 14

A charged atom with an unstable amount of electrons and protons

Answer 14

Ion

Question 15

A group of 8 electrons occupying a shell in an atom

Answer 15

Octet