Answer:
The correct answer is - potassium.
Explanation:
Electron configuration is the representation of the distribution or arrangement of electrons in orbital shells and subshells of a particular atom. IN this question the given electron configuration is -
1s^22s^22p^63s^23p^64s^1
By the configuration, it is clear that it belongs to
- the s group as the last electron is n s orbital and
- only 1 electron which means it belongs to group 1 in the periodic table
- last orbital is 4 so it is from the 4th period
- total electron = 19
Thus, the correct answer is - Potassium or K.
