acids are substances that ionize (break off) in an aqueous solution to produce hydrogen (h+) ions
explanation:
hope this and sorry i could only come up with one answer!
Answer from: Quest
The problem here is that according to aufbau principle before 3d orbital 4s subshell comes.after filling 3p orbital with electrons you have 4 electrons left, you place two in 4s with opposite spin and the other two in 3d in any of its two orbitals of total five orbitals with the same spin.
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