atoms elements molecules and compounds

Question 1

Atom

Answer 1

the smallest particle of an element that can exist.

Question 2

Element

Answer 2

a pure chemical substance that cannot be physically split into a more simple substance each is made of one type of atom carbon mercury and hydrogen are examples.

Question 3

Molecules

Answer 3

the smallest particle of a substance that can exist it is composed of two or more atoms.

Question 4

Compounds

Answer 4

a substance made of atoms made from two or more elements

Question 5

proton

Answer 5

a particle of matter that has a positive electric charge and forms part of the molecules of an atom

Question 6

Neutron

Answer 6

a particle of matter that has no electrical charge and forms part of the nucleus of an atom

Question 7

Electron

Answer 7

a particle of matter that has a negative electric 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 number 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 reperpentastion of an element