Changes

| style="height:20px; width:200px; text-align:center;" |[[Hydrogen]] has the symbol [[Hydrogen|H]]. The [[Relative Atomic Mass Number|mass number]] shows there is 1 [[particle]] in the [[nucleus]] and the [[Atomic Number|atomic number]] shows that it has 1 [[proton]].| style="height:20px; width:200px; text-align:center;" |[[Helium]] has the symbol [[Helium|He]]. The [[Relative Atomic Mass Number|mass number]] shows there are 4 [[particle]]s in the [[nucleus]] and the [[Atomic Number|atomic number]] shows that it has 2 [[proton]]s.| style="height:20px; width:200px; text-align:center;" |[[Lithium]] has the symbol [[Lithium|Li]]. The [[Relative Atomic Mass Number|mass number]] shows there are 7 [[particle]]s in the [[nucleus]] and the [[Atomic Number|atomic number]] shows that it has 3 [[proton]]s.| style="height:20px; width:200px; text-align:center;" |[[Beryllium]] has the symbol [[Beryllium|Be]]. The [[Relative Atomic Mass Number|mass number]] shows there are 9 [[particle]]s in the [[nucleus]] and the [[Atomic Number|atomic number]] shows that it has 4 [[proton]]s.