Unit 4 - Elements, compounds & reactions Flashcards
A substance made up of only one type of atom
Element
An element that occurs naturally
Native element
Two or more elements that are chemically joined together such as water (H2O)
Compound
The basic building block of an element that cannot be broken down
Atom
A table of all the known elements in order of atomic number
Periodic Table
A horizontal row of elements in the Periodic Table
Period
A vertical column of elements in the Periodic Table
Group
The number of an element in the Periodic Table
Atomic number
The number related to the mass of one atom in an element
Atomic mass
Able to be stretched out to a thin wire
Ductile
Able to be bent without breaking
Malleable
To make a sound like a bell when hit
Sonorous
A material that allows heat to pass easily
Conductor
A group of non-metal elements
Halogen
The type of chemical compound which is the product of a neutralisation reaction
Salt
An unreactive substance in group 8 of the Periodic Table
Noble gas
To be chemically unreactive
Inert
When an element shows the properties of metals and non-metals
Metalloid / semi-metal
A material used in electronic circuits
Semiconductor
When a solvent evaporates to leave crystals of solid
Crystalline
The description of a material that emits nuclear radiation
Radioactive
To get a metal from an ore
Extraction
The rock from which a metal is extracted
Ore
To separate using electricity
Electrolysis
The chemical process that reduces the amount of oxygen in a compound
Reduction
The temperature at which a solid changes state to a liquid
Melting point
Poisonous
Toxic
The mass of a material per unit volume
Density
