Question

part 3 (1 point) calcium chloride contains calcium and chloride ions. write the ground - state electron configuration for the calcium ion. you may write either the full or condensed electron configuration. part 4 (1 point) write the ground - state electron configuration for the chloride ion. you may write either the full or condensed electron configuration.

Explanation:

Step1: Recall calcium atom properties

Calcium (Ca) has atomic number 20. A calcium ion ($Ca^{2 +}$) has lost 2 electrons.

Step2: Write full electron - configuration

The full electron - configuration of a neutral Ca atom is $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}$. After losing 2 electrons to form $Ca^{2+}$, the electron - configuration is $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}$.

Step3: Write condensed electron - configuration

The noble gas that precedes Ca is Ar. The condensed electron - configuration of $Ca^{2+}$ is $[Ar]$.

Step4: Recall chlorine atom properties

Chlorine (Cl) has atomic number 17. A chloride ion ($Cl^{-}$) has gained 1 electron.

Step5: Write full electron - configuration

The full electron - configuration of a neutral Cl atom is $1s^{2}2s^{2}2p^{6}3s^{2}3p^{5}$. After gaining 1 electron to form $Cl^{-}$, the electron - configuration is $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}$.

Step6: Write condensed electron - configuration

The noble gas that precedes Cl is Ne. The condensed electron - configuration of $Cl^{-}$ is $[Ne]3s^{2}3p^{6}$.

Answer:

Part 3:
Full: $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}$
Condensed: $[Ar]$
Part 4:
Full: $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}$
Condensed: $[Ne]3s^{2}3p^{6}$