Calcium is a mineral essential for healthy bones and teeth, muscle function, nerve transmission, and blood clotting. Good dietary sources of calcium include dairy products, leafy greens, fortified foods, and some types of fish. Adequate intake of calcium is important for maintaining overall health and preventing conditions like osteoporosis.
The mass number of an element is the sum of the number of protons and neutrons in its nucleus. Calcium has 20 protons, so calcium-41 would have 41 - 20 = 21 neutrons.
The number of protons in an atom determines its atomic number, which is the same for all calcium atoms (20). The mass number of an atom is the sum of its protons and neutrons. The different mass numbers for these calcium atoms are due to variations in the number of neutrons, resulting in isotopes of calcium.
The mass number of an atom of calcium with twenty protons and twenty neutrons is 40. This is because the mass number is the sum of the protons and neutrons in the nucleus of an atom.
The oxidation number of calcium in the compound CaOCl2 is +2. In compounds, the sum of the oxidation numbers must equal zero, and since oxygen has an oxidation number of -2 and chlorine has an oxidation number of -1, the calcium ion must have an oxidation number of +2 to balance the charges.
The element is calcium. It has an atomic number of 20, which corresponds to the number of protons. The sum of protons and neutrons gives the atomic mass number, which is 40 in this case.
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Calcium and iron must be included on the Nutrition Facts label.
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40.078 describes atomic mass of calcium. It is the sum of of of protons and neutrons.
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