8F - The Periodic Table

Question 1

Atom

Answer 1

Smallest units of all matter. Cannot be broken down any further

Question 2

Element

Answer 2

Made of only one type of atom

Question 3

Dalton’s atomic theory

Answer 3

All matter is made up of atoms which are indestructible and cannot be created. In compounds, each atom of an element is always joined to a fixed number of atoms in another element. During chemical reactions, atoms rearrange to make new substances

Question 4

Signs of chemical reactions

Answer 4

Change of colour, gas produced, solid formed from solution, energy change

Question 5

Properties of most metals

Answer 5

High melting point, malleable, good conductors of heat and electricity, shiny, strong

Question 6

Properties of non-metals

Answer 6

Poor conductors of heat and electricity, dull, low melting point, solids or gases, brittle

Question 7

Catalyst

Answer 7

Substances that speed up chemical reactions without being used up themselves

Question 8

Chemical properties

Answer 8

E.g flammability, pH, reaction with acid

Question 9

Physical properties

Answer 9

E.g melting point, boiling point, density

Question 10

Reactivity increases going…

Answer 10

Down a group in group 1 (alkali metals) and up in group 7 (halogens)