GCSE chemistry- atomic structure

Atoms are joined together by chemical bonds, which involve the electrons found around the nucleus of the atom. Covalent bonds and ionic bonds are two types of chemical bond.

During a chemical reaction, reactants are changed into products. Chemical symbols and formulae are used to represent substances in symbol equations. Molecular formulas show the number of each type of atom in a molecule, while displayed formulas show the atoms and bonds in a molecule.

Atoms

Atoms have a small central nucleus surrounded by even smaller particles called electrons. The nucleus is positively charged,…