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 etc 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

subscript

Answer 4

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

Question 5

chemical symbol

Answer 5

a one or two letter representation of an element

Question 6

compound

Answer 6

a substance made of atoms from two or more elements

Question 7

proton

Answer 7

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

Question 8

mass number

Answer 8

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

Question 9

atomic number

Answer 9

number of protons. Top number in the element box

Question 10

neutron

Answer 10

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

Question 11

electron

Answer 11

a particle of the matter that has a negative electrical charge and travels around the nucleus of an atom