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Calcium is in group 2/IIA, so the other elements in that group would be expected to behave most like calcium.

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What element would react most likely calcium?

Calcium is an alkaline earth metal that readily reacts with nonmetals, particularly halogens. Among these, chlorine is a highly reactive element that would likely react with calcium to form calcium chloride (CaCl₂). Additionally, calcium can react with oxygen to form calcium oxide (CaO) and with sulfur to form calcium sulfide (CaS). Overall, halogens like chlorine are among the most likely elements to react with calcium.


What types of atoms would you expect to find in the element sodium?

you only find 1 type of atom in an element


How many electrons would the element calcium need to be electrically neutral?

Calcium is an element with an atomic number of 20, which means it has 20 protons in its nucleus. To be electrically neutral, an atom must have an equal number of electrons to protons. Therefore, calcium would need 20 electrons to be electrically neutral.


What would happen if you tried to swallow a lump of the element calcium without the compound calcium?

Your body would not be able to absorb the pure element calcium as-is. In its elemental form, calcium is not soluble in water and cannot be efficiently digested. It is essential to consume calcium in compounds like calcium carbonate, found in foods and supplements, for it to be effectively utilized by the body. Swallowing a lump of pure calcium could lead to digestive issues or blockages.


Where would to expect to find an element with the greatest electronegativity?

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