Atoms, Elements, Compounds And Mixtures Flashcards
What is an element?
Substances made from only one type of particle
What are atoms?
Small particles
What is a molecule?
When two or more particles are joined together
What is a compound?
Compounds are substances made from different types of atoms
What is a mixture?
A mixture contains more than one substance
Explain the periodic table
A table organising the elements. Each column with the numbers are called groups. Each element in the same group have similar properties.
What is chemical change?
It can make a new substance
How can you identify a chemical change?
It either changes colour, temperature, a be substance is formed or it is irreversible
What is a physical change?
It doesn’t create a new substance
Explain the properties of the air we breath
78% nitrogen 21% oxygen 1% argon 0.1% water 0.035% carbon dioxide
Where are noble gases found in the periodic table?
On the extreme right
