Changes

| style="height:20px; width:200px; text-align:center;" |[[Hydrogen]] always has 1 [[proton]] but in this case has [[isotope]] there are no [[neutron]]s.| style="height:20px; width:200px; text-align:center;" |[[Hydrogen]] always has 1 [[proton]] but in this case also has a [[isotope]] there is 1 [[neutron]]. This [[isotope]] of [[Hydrogen]] is known as [[Deuterium]].| style="height:20px; width:200px; text-align:center;" |[[Lithium]] always has 3 [[proton]]s but in this case has [[isotope]] there are 4 [[neutron]]s.| style="height:20px; width:200px; text-align:center;" |[[Lithium]] always has 3 [[proton]]s but in this case has [[isotope there are 3 [[neutron]]s.