Atoms, Elements, Molecules, and Compound Vocabulary

Question 1

Atoms

Answer 1

The smallest particle of an element that can exist.

Question 2

Elements

Answer 2

A pure chemical substance that can not be physically split into a more simple substance. Each is made of one type of atom. Carbon mercury and hydrogen and examples.

Question 3

Molecule

Answer 3

The smallest particles of a substance that can exist. It is composed of two or more atoms.

Question 4

Compound

Answer 4

A substance made of atoms from two or more different elements.

Question 5

Proton

Answer 5

A particle of matter that has a positive electric charge and found in the nucleus of an atom.

Question 6

Neutron

Answer 6

A particle of matter that has no electrical change and found in the nucleus of atom.

Question 7

Electron

Answer 7

A particle of matter that has negative electrical change in travels around the nucleus of an atom.

Question 8

Atomic Number

Answer 8

= The number of protons in an element’s atoms. Top number in the element box.

Question 9

Mass Number

Answer 9

Number of protons plus neutrons. Bottom number in the element box.

Question 10

Chemical Symbol

Answer 10

A one or two letter representation of an element.

Question 11

Subscript

Answer 11

Tiny number to the right of the element symbol. Tells you how many atoms of that element.