Topic 3 Elements Compounds and the Periodic table Flashcards
What is everything in the universe composed of?
Tiny particles called atoms
An element is made up of what?
1 type of atom eg. oxygen atom is made of oxygen
How are Elements used in everyday life
We breathe oxygen
We use helium in balloons
What is the difference between elements, compounds and mixtures?
An element is made of 1 type of atom
A compound is 2 elements forced together
What are signs of a chemical reaction?
Colour change
Release of gas
Energy change
Bright light
What is the Periodic Table?
The periodic table is a table of all the Elements which are sorted into groups and each element is given a number
What is a compound?
a substance that contains atoms of 2 or more elements bonded together
What is the difference between a chemical and a physical change?
A chemical change can’t be undone but a physical change can
