Question #b327d
2 Answers
Sc is 21 to Zn with 30 and after Zn is Ga with 31 protons and goes to Kr with 36. There is no anomaly, please rephrase the question to clearly state your doubt if this doesn't clarify.
I think you may be making a mistake. Keep in mind that you read the periodic table with increasing Z by periods (rows), not by groups (columns).
Explanation:
Check this periodic table: 
If you start in the first period (row), you have that only the groups 1 and 18 have elements in it: H and He.
In the 2nd and 3rd period, only the groups 1-2, 13-18 have elements.
The groups from 3 to 12 (transition metals) only begin to have representation in the 4th period. If you read the Z of the atoms in the 4th period, you'll see that the increase of Z is exactly as expected.
Was this the misconception you were having?
