Atoms

Question 1

Atoms

Answer 1

the smallest particle of an element and cannot be broken down further

Question 2

Molecules

Answer 2

two or more of the same atoms chemically bonded together

Question 3

Element

Answer 3

is a pure substance only made out of one type of atom and cannot be broken down into other substances

Question 4

Compound

Answer 4

a substance with two or more elements chemically bonded together

Question 5

mixture

Answer 5

group of substances not chemically joined together

Question 6

atomic structure

Answer 6

contains a nucleus in the middle (neutrons+protons) surrounded by electrons, orbiting in shells.

Question 7

Proton

Answer 7

relative mass = 1

relative charge = 1

Question 8

Neutron

Answer 8

relative mass = 1

relative charge = 0

Question 9

Neutron

Answer 9

relative mass = 1/1860

relative charge = -1

Question 10

atomic number

Answer 10

number of protons = number of electrons

Question 11

mass number

Answer 11

number of protons + neutron

Question 12

isotopes

Answer 12

isotopes are atoms of the same element but have a different number of neutrons in the nucleus but same number of protons and electrons

Question 13

Relative atomic mass
35Cl = 75%
37Cl= 25%

Answer 13

RAM = 35(75/100) + 37(25/100) = 35.5

Question 14

periodic table

Answer 14

arrangement of elements in atomic number.