Calcium is an alkaline earth metal, that is a reactive pale yellow metal that develops a dark oxide-nitride layer as soon as exposed to air. That is physical and also chemical properties room most similar to its more heavier homologues strontium and also barium.
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The largest use the metallic calcium is in steelmaking, because of its solid chemical affinity because that oxygen and sulfur.
Pure calcium steel is currently made commercially by heater lime v aluminum.
Protons and Neutrons in Calcium
The full number of neutrons in the nucleus of one atom is called the neutron number of the atom and also is provided the symbol N. Neutron number plus atomic number equals atom mass number: N+Z=A. The difference between the ghost number and the atom number is known as the neutron excess: D = N – Z = A – 2Z.
For steady elements, there is typically a variety of steady isotopes. Isotopes are nuclides that have the exact same atomic number and are therefore the very same element, yet differ in the number of neutrons. Mass numbers of common isotopes of Calcium are 40; 42; 43; 44; 46.
Main isotope of Chlorine
Natural calcium is a mixture of five stable isotope (40Ca, 42Ca, 43Ca, 44Ca, and 46Ca) and also one isotope through a half-life so lengthy that it have the right to be taken into consideration stable because that all valuable purposes (48Ca, with a half-life of about 4.3 × 1019 years). Calcium is the first (lightest) aspect to have six naturally emerging isotopes.
Calcium-40 is written of 20 protons, 20 neutrons, and 20 electrons. By much the most common isotope of calcium in nature is 40Ca, which renders up 96.941% that all natural calcium. It is created in the silicon-burning procedure from combination of alpha particles and is the heaviest stable nuclide with equal proton and neutron numbers
Calcium-42 is composed of 20 protons, 22 neutrons, and also 20 electrons.
Calcium-43 is created of 20 protons, 23 neutrons, and also 20 electrons.
Calcium-44 is written of 20 protons, 24 neutrons, and also 20 electrons.
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Calcium-46 is composed of 20 protons, 26 neutrons, and also 20 electrons. 46Ca and 48Ca are the first “classically stable” nuclides v a six-neutron or eight-neutron overabundance respectively. Although incredibly neutron-rich because that such a irradiate element, 48Ca is very stable because it is a double magic nucleus, having actually 20 protons and 28 neutrons i ordered it in closed shells.