Calcium (Ca)

Makes your bones and teeth strong.

Calcium facts

Cloudy bubbles! Calcium meets WaterCalcium hydroxide + hydrogen gas Ca + 2H₂O → Ca(OH)₂ + H₂ · At room temperature · Try it

Calcium makes a new substance with 16 other elements and chemicals in our lab:

Calcium + HydrogenCalcium hydride Ca + H₂ → CaH₂ · When heated · Try it
Calcium + BoronCalcium boride Ca + 6B → CaB₆ · Only in a very hot furnace · Try it
Calcium + CarbonCalcium carbide Ca + 2C → CaC₂ · Only in a very hot furnace · Try it
Calcium + NitrogenCalcium nitride 3Ca + N₂ → Ca₃N₂ · Only when heated very strongly · Try it
Calcium + OxygenCalcium oxide (quicklime) 2Ca + O₂ → 2CaO · When heated · Try it
Calcium + FluorineCalcium fluoride Ca + F₂ → CaF₂ · At room temperature · Try it
Calcium + SiliconCalcium disilicide Ca + 2Si → CaSi₂ · Only in a very hot furnace · Try it
Calcium + PhosphorusCalcium phosphide 3Ca + 2P → Ca₃P₂ · When heated · Try it
Calcium + SulfurCalcium sulfide Ca + S → CaS · When heated · Try it
Calcium + ChlorineCalcium chloride Ca + Cl₂ → CaCl₂ · At room temperature · Try it
Calcium + SeleniumCalcium selenide Ca + Se → CaSe · When heated · Try it
Calcium + BromineCalcium bromide Ca + Br₂ → CaBr₂ · At room temperature · Try it
Calcium + TelluriumCalcium telluride Ca + Te → CaTe · When heated · Try it
Calcium + IodineCalcium iodide Ca + I₂ → CaI₂ · At room temperature · Try it
Calcium + PoloniumCalcium polonide Ca + Po → CaPo · Only in a special nuclear lab (it is radioactive) · Try it
Calcium + Hydrochloric AcidCalcium chloride + hydrogen gas Ca + 2HCl → CaCl₂ + H₂ · At room temperature · Try it

It also blends into a mixture, like an alloy, with 74 other metals when melted together.

Nothing happens when it's simply mixed with 7 of the others. 21 pairings have never been tried, because not enough atoms have ever existed.