Question

Give the electron configuration for the calcium ion. Please help? Thank you.

Answer 1

The electron configuration of a calcium ATOM would be $4s^2$

But, the calcium ION has two electrons less than a calcium atom.

The electron configuration of a calcium ION should be the same as Argon since a calcium ion is missing 2 electrons.

Your answer is $1s^2 2s^2 2p^6 3s^2 3p^6$

Have an awesome day! :)

Answer 2

The electronic configuration of calcium ion $\left({{\text{C}}{{\text{a}}^{2 + }}}\right)$  is $\boxed{1{s^2}2{s^2}2{p^6}3{s^2}3{p^6}}$ .

Further Explanation:

Electronic configuration:

It is the distribution of electrons of an atom in the atomic orbitals. There are two states for an electron: ground as well as the excited state. The configuration of the atom in the lowest possible energy levels is called the ground-state electronic configuration.

The filling of electrons in different energy levels or orbitals is done in accordance with the following three rules.

1. Aufbau principle: It states that the electrons are filled in various orbitals in the increasing order of their energies as follows:

$1s$

2. Hund’s rule: Electron pairing will not start until each orbital is singly occupied.

3. Pauli’s exclusion principle: According to this principle, all the four quantum numbers $\left({n,\;l,\;{m_l},\;{m_s}}\right)$  for any two electrons can never be the same. In an orbital, the spin of two electrons has to be different. If one electron has the clockwise spin, the other would have the anticlockwise spin and vice-versa.

According to the periodic table, the atomic number of calcium (Ca) is 20 and its electronic configuration is $1{s^2}2{s^2}2{p^6}3{s^2}3{p^6}4{s^2}$ . It loses two 4s electrons to form ${\text{C}}{{\text{a}}^{2 + }}$  and its electronic configuration becomes $1{s^2}2{s^2}2{p^6}3{s^2}3{p^6}$ .

Learn more:

1. Determine the ion with configuration $\left[{{\text{Ar}}}\right]\;3{d^2}$ : brainly.com/question/7599542

2. Identification of element with electronic configuration $1{s^2}2{s^2}2{p^2}3{s^1}$ : brainly.com/question/9616334

Answer details:

Grade: High School

Subject: Chemistry

Chapter: Electronic configuration of the elements

Keywords: electronic configuration, calcium, Ca, atomic number, 20, Aufbau principle, Pauli’s exclusion principle, Hund’s rule, calcium ion, periodic table.