2)Hydrogen
Electrons(e-) 1
protons(p+) 1
Neutrons(n°) 0
3)Calcium
Electrons(e-) 20
protons(p+) 20
Neutrons(n°) 20
4)Cobalt
Electrons(e-) 27
protons(p+) 27
Neutrons(n°) 32
5)Magnesium
Electrons(e-) 12
protons(p+) 12
Neutrons(n°) 12
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2)Hydrogen
Electrons(e-) 1
protons(p+) 1
Neutrons(n°) 0
3)Calcium
Electrons(e-) 20
protons(p+) 20
Neutrons(n°) 20
4)Cobalt
Electrons(e-) 27
protons(p+) 27
Neutrons(n°) 32
5)Magnesium
Electrons(e-) 12
protons(p+) 12
Neutrons(n°) 12