What are the differences in the composition of the calcium atom and the calcium cation? Write both electronic formulas.
July 25, 2021 | education
| An atom is an electrically neutral particle, so the charge of the nucleus and the number of electrons in it coincide. Calcium has a serial number 20, which means the charge of its nucleus is +20, and 20 electrons are located at 4 energy levels, because it is located in the 4th period. The electronic formula of the Ca atom is -1s2 2s22p6 3s23p6 4s2. A cation is a positively charged ion, the charge is formed as a result of the release of electrons by an atom from the last energy level. Calcium has 2 of them, therefore the Ca (+2) cation – 1s2 2s22p6 3s23p6.
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