The atomic numbers of five atoms are given below.
Which atom would have an electronic configuration ending in a p^5?
A. 7
B. 9
C. 5
D. 8
E. 6
Let us write a complete electronic confirguration for this atom. If it’s configuration stops at p^5, it should look like so:
1s^22s^22p^5
Since it is a neutral atom, we can count the number of electrons present and that number would also be our proton/atomic number.
2+2+5= 9 electrons/protons
Our answer is therefore, B.
2 Likes