Elements,compunds and Mixtures Flashcards
What are all substances made up of?
Atoms
What is an element made up of
Only one type of atom
What is an element
A substance that cannot be broken down to anything simpler - made up of only one type of atom
What is a molecule
Made up of 2 or more atoms joined together - atoms may be the same eg O2 or different CO2
Where do you find all the elements listed
Periodic table
What are there more elements of - metals or non metals
Metals
What side of the periodic table contains the non metals
Right hand side
What are the columns of periodic table called
Groups
What are the rows of periodic table called
Periods
What state are most metals?
Solid except mercury which is a liquid
What state are non metals
Mostly gas
Metals have a number of properties - name 3
Lustre (shiny)
Good electrical conductors
Good thermal conductors
Malleable (can be bent)
Usually high density
Give some properties of non metals
Poor conductors of heat and electricity
Brittle
Dull
Low density
What is a compound
Made up of 2 or more elements chemically joined together
When magnesium is burnt in air what is formed
Magnesium oxide
