Combination of Calcium to other chemical: Calcium + chlorine= CaCl2 Calcium + Phosphorus=Ca3P2 Calcium phosphide Calcium + Oxygen + Silicon=CaSiO3 They called as Calsium Silicate The presence of a calcium ion in the inorganic active site of the complex that produces oxygen is particularly puzzling, because the reaction is a redox process involving the transfer of multiple electrons, whereas calcium is redox inactive (it cannot transfer electrons under biological conditions). This is due to Calcium being oxidation state +2 and Oxygen oxidation state is -2, this means when formed in a compound they cancel each other out to give CaO. Alkaline earth metals also react with oxygen, though not as rapidly as Group 1 metals; these reactions also require heating. It explains why it is difficult to observe many tidy patterns. Bromine = Br2, with a charge of 1-, since it tends to gain one electron when it reacts (it is also a diatomic molecule, so it forms in pairs of atoms, hence the subscript 2). The Facts. This page looks at the reactions of the Group 2 elements - beryllium, magnesium, calcium, strontium and barium - with air or oxygen. Calcium = Ca, with a charge of 2+, since it tends to lose two electrons when it reacts. Reaction of calcium with water. Reaction of Calcium with Oxygen Calcium metal slowly oxidizes in air, becoming encrusted with white \(CaO\) and \(CaCO_3\), which protect from attack by air. Hi, the answer you are looking for is 2Ca + O2 --> 2CaO. Incompatibilities & Reactivities Water (liberates heat), fluorine, ethanol [Note: Reacts with water to form calcium hydroxide.] When ignited, Calcium burns to give calcium xxide. On the whole, the metals burn in oxygen to form a simple metal oxide. The reactions with oxygen. The mechanism of oxygen production in photosynthesis remains unresolved, despite many studies. This is in contrast with magnesium, immediately above calcium in the periodic table, which is virtually unreactive with cold water. The balanced equation is: 3Sr + N2 -> Sr3N2. Word Equation: Calcium + Bromine >>>> Calcium bromide The reaction forms calcium hydroxide, Ca(OH) 2 and hydrogen gas (H 2). The reaction between strontium and nitrogen gas (which has the formula N2) produces strontium nitride, which has the formula Sr3N2. Noncombustible Solid, but will support combustion by liberation of oxygen. Formula and structure: Calcium oxide chemical formula is CaO and its molar mass in 56.0774 g mol-1.The molecule is formed by the calcium cation Ca +2 and the oxygen anion O-2, which form a ionic bond.The calcium oxide ionic lattice is cubic and similar to NaCl lattice, with an ion surrounded by 6 opposite charge-ion. Reactions with Group 2 Elements. 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