Chemistry Part 2

Properties of metals

Luster
malleable
Solid
Conductive
Ductile

Properties of Metalloids

Luster
Not Malleable
Not durable
Not Ductile
Semi Conductive

Properties of non- metals

Brittle Solids
Not Malleable
Not Conductive
Not Ductile
Gaseous

Metallic Bonding

Metal + Metal

Ionic Bonding

Metal + Non- metal

Covalent Bonding

Non metal + non metal

pH scale

Concertation of hydrogen ions (H) in a solution

Acid

Produces hydrogen ions in aq solution
strong produces more hydrogen than a weak acid

Bases

Produces hydroxide
can accept h
alkali is a base that dissolves in water

acid + metal

salt + hydrogen gas

acid + base

salt + water

acid + carbonate

salt + water + carbon dioxide

Displacement reactions

more reactive metal is placed in a solution with a less reactive metal ion
*reactivity series

Exothermic reactions

release energy

Endothermic reactions

absorb energy

Combustion

Substance reacting with oxygen to produce light and heat- exothermic reaction.
Oxygen is always a reactant and hydrocarbons burn in oxygen to produce large amounts of energy

Displacement

one replaces another
reactivity series

Precipitation reaction

solid forms
*solubility rules

Neutralisation

acid + base → salt + water
salt is made from the metal and the base

Combustion

reacts with oxygen to produce oxides.

Synthesis reactions

two things join together to produce one product
A + B → AB

Decomposition reaction

one compound breaks apart
AB → A + B