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 physical 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 particle 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 elements.

Question 5

Proton

Answer 5

a particle of matter that has a positive electrical charge and forms part f the nucleus 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 electrical charge and travels around the nuclecus of an atom

Question 8

Atomic Number

Answer 8

Number of protons top number in the element bix.

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 represntation of an element

Question 11

Subscript

Answer 11

Tiny numbers to the right of the element symbol. tell you how many atoms of that elements.