Atoms, Elements, Molecules, and Compounds

Question 1

Atoms

Answer 1

The smallest particle of an element that can exist.

Question 2

Element

Answer 2

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

Question 3

Molecule

Answer 3

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

Question 4

Compound

Answer 4

A substane made of atoms from two or more elements.

Question 5

Proton

Answer 5

A particle of matter that has a positive electrial charge and forms part of the nuleus of an atom.

Question 6

Neutron

Answer 6

A particle of matter that has no electrical charge and forms part of the nuceus of an atom.

Question 7

Elecctron

Answer 7

A particle of matter that has a negitive electrical charge and travels around the nucleus of an atom.

Question 8

Atomic Number

Answer 8

Number of protons Top number in the element box.`

Question 9

Mass Number

Answer 9

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

Question 10

Subscript

Answer 10

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

Question 11

Chemical symbol

Answer 11

A one or two letter represntation of an element.