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Calcium shares the most characteristics with magnesium.Both belongs to 2nd group of alkaline earth metals.
fluorine
The halogen gas that is that most reactive of all elements is Fluorine
Fluorine.
chlorine (Cl)
Many similarities exist between fluorine and chlorine.
calcium
calcium
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Calcium shares the most characteristics with magnesium.Both belongs to 2nd group of alkaline earth metals.
potassium (K)
The most electronegative element fluorine.
This element is fluorine.
Fluorine, F, is the most reactive element of all.
Fluorine is the most reactive element.
The most reactive is fluorine.