Sodium.
Sodium is more reactive than calcium, because sodium has one valence electron whereas calcium has two valence electron. It is easier to lose one electron and react with oxygen and form sodium oxide, compared to losing two electrons and from calcium oxide.
Sodium is easier to form Na+ then Calcium forming Ca2+. The main reason is because Sodium has got 1 valence electron, which is more unstable than Calcium having 2 valence electrons. It requires less energy to remove one electron from Sodium than two electrons from Calcium. Therefore, Sodium is higher than Calcium in the reactivity series.
Calcium. I know because I studied chemistry.
no reaction
i dont know read about it fawk
sodium and flourine
Sodium is a highly reactive element. It is unstable to exist on its own and will react whenever it is capable, which is very likely in nature.
Sodium
Fluorine and oxygen
Sodium is easier to form Na+ then Calcium forming Ca2+. The main reason is because Sodium has got 1 valence electron, which is more unstable than Calcium having 2 valence electrons. It requires less energy to remove one electron from Sodium than two electrons from Calcium. Therefore, Sodium is higher than Calcium in the reactivity series.
Argon
Mg (magnesium)
Calcium. I know because I studied chemistry.
no reaction
Sodium is one.
i dont know read about it fawk
sodium and flourine
Helium.