Calcium, alone among the elements listed, does not form a diatomic molecule with another atom of itself.
Br2 + CaI2 ----> CaBr2 + I2 bromine and iodine are diatomic molecules
they are all in the same period and they all have the same valance number (+2)
Because they have the same valence number (+2)
Calcium and potassium
Calcium nitrate - Ca(NO3)2- contain Ca, N and O.
CO2
calcium
Br2 + CaI2 ----> CaBr2 + I2 bromine and iodine are diatomic molecules
Nitrogen is a nonmetal.
Nitrogen is the only one I know, but carbon can form a divalent ion with the formula C2H2-2, which occurs in calcium carbide.
Nitrogen has the highest electronegativity.
Diatomic homonuclear molecules are hydrogen H2, oxygen O2, nitrogen N2, fluorine F2, chlorine Cl2, bromine Br2, iodine I2 and (theoretically) astatine At2. Diatomic heteronuclear molecules encompass a broader range of compounds such as carbon monoxide CO, hydrogen chloride HCl, lithium iodide LiI, cyanide CN and calcium oxide CaO.
Carbon, Nitrogen, Oxygen, Hydrogen, and Calcium
Calcium, Ca, and oxygen, O2, are elements (first is mono-atomic, the second is diatomic). Calcium oxide, CaO, is a molecule made of two elements.
Sodium +1 Aluminum +3 Calcium +2 Sulfer -2 Nitrogen -3
4 ELEMENTS IN A CELL? hydrogen, oxygen, nitrogen, carbon
they are all in the same period and they all have the same valance number (+2)