Element: Contains only one type of atom
Compound: Two or more elements chemically joined together
Atom:
- All living things are made up of atoms
- They are the smallest part of an object
- An atom is made up of a nucleus with electrons, protons and neutrons around it
- Protons and electrons have opposite charges ( +ve and -ve), while Neutrons are neutral
- Atoms are neutral (have the same number of protons and electrons)
- Atomic number = no. of electrons/ protons
- Mass number = no. of protons + neutrons
- Elements (atoms) are arranged on the periodic table in order of their atomic number
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