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The atomic number of calcium is 20 as it has 20 protons and 20 electrons, they are located outside the Nucleus in the orbits known as energy levels, and are commonly known as shells of the atom. in the first energy level there are 2 electrons, in the second energy level there are 8 electron, in the third energy level there are 8 electrons, and in the fourth energy level there are 2 electrons.
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RossCalcium has 20 electrons. These electrons are arranged in various energy levels or shells around the nucleus of the atom. Specifically, calcium has 2 electrons in the first energy level and 8 electrons in the second energy level, with the remaining 10 electrons in the third energy level.
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How many valence electrons does calcium carbonate have?
Calcium carbonate has 16 valence electrons. Calcium contributes 2 valence electrons, while each oxygen atom contributes 6 valence electrons.
A cation of calcium has a 2 plus charge how many electrons does it have?
A calcium ion with a 2+ charge has lost 2 electrons. This means it now has 18 electrons, as the atomic number of calcium is 20 and losing 2 electrons results in an ion with 18 electrons.
Would you expect calcium to gain or lose electrons in a chemical reactions?
Calcium is expected to lose electrons in a chemical reaction because it is a metal located in group 2 of the periodic table, which typically loses electrons to achieve a stable electron configuration. Calcium will typically form a 2+ cation by losing 2 electrons in reactions.
How many outer ring electrons do calcium and oxygen have?
Calcium has 2 outer ring electrons, while oxygen has 6 outer ring electrons.
How many electrons does calcium have in the second energy level?
Calcium atoms have 8 electrons in the second energy level. However, they are not the valence electrons. The outermost electrons in a calcium atom in the ground state are 2 4s electrons. So calcium atoms in the ground state have 2 valence electrons in the fourth energy level.
