Question

1st attempt part 1 (1 point) to format the electron configuration correctly make sure to superscript where needed, do not add spaces to your answer and italics are not possible in this module. write the ground - state electron configuration for calcium, ca. you may write either the full or condensed electron configuration.

Explanation:

Step1: Recall calcium's atomic number

Calcium (Ca) has an atomic number of 20, which means it has 20 electrons in its ground - state.

Step2: Write the full electron configuration

Using the Aufbau principle, the electron configuration is $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}$.

Step3: Write the condensed electron configuration

The noble - gas core before calcium is argon (Ar). Argon has 18 electrons. So the condensed electron configuration is $[Ar]4s^{2}$.

Answer:

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