Chemistry Year 7 - Elements and Compounds
Physical Change - Change in state, size or shape (easy to reverse)
Chemical Change - Reaction (hard to reverse)
An element is made of only 1 type of atom
Compounds are produced when elements combine - they are very different to their original elements
A molecule is when more than 1 atom is bonded together chemically
Chemical Change - Reaction (hard to reverse)
An element is made of only 1 type of atom
Compounds are produced when elements combine - they are very different to their original elements
A molecule is when more than 1 atom is bonded together chemically