Atomic structure

Question 1

Atom

Answer 1

The smallest particle of a chemical element that can exist

Question 2

Molecule

Answer 2

A group of atoms bonded together

Question 3

Element

Answer 3

A substance that cannot be broken down into simpler substances by chemical means

Question 4

Compound

Answer 4

When two or more elements chemically combine in a fixed ratio by mass

Question 5

Mixture

Answer 5

A physical combination of two or more substances that aren’t chemically joined

Question 6

Nucleus

Answer 6

Contains genetic material, including DNA, which controls the cell’s activities

Question 7

Proton

Answer 7

A tiny particle that is found in the nucleus of an atom

Question 8

Neutron

Answer 8

The particles in an atom that have a neutral charge

Question 9

Electron

Answer 9

A negatively charged subatomic particle that can be either bound to an atom or free (not bound)

Question 10

Isotope

Answer 10

Atoms with the same number of protons but different numbers of neutrons are called “isotopes”

Question 11

Atomic Mass

Answer 11

The quantity of matter contained in an atom of an element