Element/alkalineearth

Atomic Symbol	Element	Protons	Electrons	Neutrons	Atomic weight
	Beryllium	4	4	5	9
	Magnesium	12	12	12	24
				13
				14
	Calcium	20	20	20	40
				22
				23
				24
				25
				26
				27
				28
	Strontium	38	38	46	88
				47
				48
				49
				50
				51
				52
	Barium	56	56	74	137
				76
				77
				78
				79
				80
				81
				82
				84
	Radium	88	88	135	226
				136
				138
				140