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 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

Molecule

Answer 3

the smallest particles of a substance that can exist. it is composed of two pr more atoms

Question 4

Compound

Answer 4

A substance made of atoms from two ore more elements

Question 5

Proton a

Question 6

Neutron

Answer 6

a particles of matter that has no electrical charge and found in the nucleus of an atom

Question 7

Electron

Answer 7

A particles of matter that has negative electrical charge and travels around the nucleus of an atom

Question 8

Atomic number

Answer 8

=the number of protons in an element 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