Chemistry

Question 1

Atom

Answer 1

The smallest unit of an element. Consisits of a central nucleus by one or more electrons.

Question 2

Nucleus

Answer 2

Central part of an atom. Made of protons and neutrons. Contains majority of the atom’ mass

Question 3

Proton

Answer 3

Positively charged particle. Found within an atomic nucleus.

Question 4

Neutron

Answer 4

Uncharged particle. Found within and atomic nucleus.

Question 5

Electron

Answer 5

Negativly charged particle. Located in shells that surround and atom’s nucleus

Question 6

Ions

Answer 6

An atom that has had electrons added or taken away which results in a positively charged or negatively charged element

Question 7

Elements

Answer 7

A molecule made up of one type of atom

Question 8

Elctron shells

Answer 8

Paths that electrons follow around an atom

Question 9

Periodic Table

Answer 9

The table used to read the elements

Question 10

Periods

Answer 10

Periods indicate how many shells an atom has

Question 11

Groups

Answer 11

Groups indicate how many valence electrons an atom has

Question 12

Periodic law

Answer 12

A law that states protons and electrons weigh 1 amu and electrons weigh nothing when calculating atomic mass

Question 13

Symbols

Answer 13

A letter or series of latters that represent each element

Question 14

Atomic numbers

Answer 14

The number used to order the elemnts. Also the number of protons in an element

Question 15

Relative atomic mass

Answer 15

A rounded value of an exact atomic mass aka atomic mass number

Question 16

Alkali metals

Answer 16

Group 1

Question 17

Alkaline Earth Metals

Answer 17

Group 2

Question 18

Halogens

Answer 18

Brightly coloured elemnts in group 7

Question 19

Noble gases.

Answer 19

Elements that do ot readily react with other substances in group 8