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Calcium is a chemical element; it has symbol Ca and atomic number 20. As an alkaline earth metal, calcium is a reactive metal that forms a dark oxide-nitride layer when exposed to air. Its physical and chemical properties are most similar to its heavier homologues strontium and barium.
The calcium cycle is a transfer of calcium between dissolved and solid phases. There is a continuous supply of calcium ions into waterways from rocks, organisms, and soils. [1] [2] Calcium ions are consumed and removed from aqueous environments as they react to form insoluble structures such as calcium carbonate and calcium silicate, [1] [3] which can deposit to form sediments or the ...
Naturally occurring calcium and barium are very weakly radioactive: calcium contains about 0.1874% calcium-48, [30] and barium contains about 0.1062% barium-130. [31] On average, one double-beta decay of calcium-48 will occur per second for every 90 tons of natural calcium, or 230 tons of limestone (calcium carbonate). [ 32 ]
Image credits: Flares117 Another interesting fact about the family who couldn't sleep comes from Redditor u/Potatoe_expert.Science writer and author of the book about said family The Family That ...
That's why we've gathered another collection of the most interesting and weird fun facts from the TIL community on Reddit. So, sink your curious teeth into these little nuggets of information that ...
BSc meteorologist Janice Davila tells Bored Panda that one of the most unknown facts from her field of expertise is that weather radars are slightly tilted upward in a half-degree (1/2°) angle.