Calcium is an alkaline planet metal, it is a reactive pale yellow steel that develops a dark oxide-nitride layer once exposed to air. Its physical and chemical properties are most similar to its heavier homologues strontium and barium.

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The largest use the metallic calcium is in steelmaking, due to its solid chemical affinity because that oxygen and also sulfur.

Pure calcium metal is currently made commercially by heating lime through aluminum.

Protons and also Neutrons in Calcium

Calcium is a chemical element with atom number 20 which way there space 20 protons in that nucleus. Total variety of protons in the nucleus is called the atomic number of the atom and also is offered the symbol Z. The total electrical fee of the nucleus is because of this +Ze, whereby e (elementary charge) amounts to to 1,602 x 10-19 coulombs.

The full number of neutrons in the cell nucleus of an atom is referred to as the neutron number of the atom and is provided the symbol N. Neutron number plus atomic number equals atomic mass number: N+Z=A. The difference in between the neutron number and also the atomic number is well-known as the neutron excess: D = N – Z = A – 2Z.

For stable elements, there is generally a variety of stable isotopes. Isotopes room nuclides that have the same atomic number and also are as such the exact same element, but differ in the variety of neutrons. Mass number of common isotopes the Calcium are 40; 42; 43; 44; 46. 

Main isotope of Chlorine

Natural calcium is a mixture of 5 stable isotope (40Ca, 42Ca, 43Ca, 44Ca, and also 46Ca) and also one isotope through a half-life so lengthy that it have the right to be thought about stable for all helpful purposes (48Ca, through a half-life of around 4.3 × 1019 years). Calcium is the first (lightest) facet to have actually six naturally arising isotopes.

Calcium-40 is created of 20 protons, 20 neutrons, and also 20 electrons. By far the most usual isotope of calcium in nature is 40Ca, which provides up 96.941% that all herbal calcium. The is created in the silicon-burning procedure from blend of alpha particles and also is the heaviest steady nuclide through equal proton and neutron numbers

Calcium-42 is composed of 20 protons, 22 neutrons, and 20 electrons.

Calcium-43 is created of 20 protons, 23 neutrons, and also 20 electrons.

Calcium-44 is composed of 20 protons, 24 neutrons, and 20 electrons.

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Calcium-46 is created of 20 protons, 26 neutrons, and also 20 electrons. 46Ca and 48Ca are the very first “classically stable” nuclides v a six-neutron or eight-neutron overabundance respectively. Although extremely neutron-rich for such a light element, 48Ca is an extremely stable due to the fact that it is a doubly magic nucleus, having 20 protons and also 28 neutrons i ordered it in closeup of the door shells.