The number of shells in calcium can be found out by writing its electronic configuration. Calcium has an atomic number of 20, which means it carries 20 electrons. There are 2 in the first electron shell, 8 in the second electron shell, another 8 in the third electron shell, and 2 in the fourth and outermost shell of calcium.
Calcium has an atomic number of 20, which means it carries 20 electrons. There are 2 in the first electron shell
electron shell
The outermost shell or orbital of an atom is called its valence shell. The electrons in these shells take part in bonding with other atoms. It may be fully filled or half-filled.
Answer: The Ca atom has a total of 20 electrons. As a result, the electron configuration of Calcium will be 1s²2s²2p63s²3p64s². Calcium's initial two electrons would be in the 1s orbital. Calcium's following valence electron will be in the 2s orbital.
In order to write the Calcium electron configuration we first need to know the number of electrons for the Ca atom (there are 20 electrons). When we write the configuration we'll put all 20 electrons in orbitals around the nucleus of the Calcium atom.
The electron shells are labeled K, L, M, N, O, P, and Q; or 1, 2, 3, 4, 5, 6, and 7; going from innermost shell outwards. Electrons in outer shells have higher average energy and travel farther from the nucleus than those in inner shells.
The n=4 shell can hold a total of 32 electrons. We determine this based on the number of sublevels in the shell and the number of orbitals in each sublevel. The n=4 shell has four sublevels labeled s, p, d, and f.
If the atom has an atomic number of 70 or more then the fourth shell holds 32 electrons. Other atoms can be searched on the periodic table of the elements. The following rule applies: The n-th energy level contains at most n^2 orbitals. Each orbital can be occupied by at most 2 electrons.
The four quantum numbers n = 4, l = 0, m = 0, s = -1/2 correspond to the element Calcium (Ca). This is deduced by understanding the meanings of the quantum numbers and referencing the periodic table.
Calcium is in group 2. The valency of a group 2 element is decided by the number of valence electrons. Here, the number of valence electrons in calcium is 2.
Therefore, the electronic configuration of an atom of the isotope calcium-45 (20Ca45) is 1s² 2s² 2p⁶ 3s² 3p⁶ 4s². In terms of the group and period, calcium is in Group 2 and Period 4 of the periodic table.
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