Which energy sublevel is being filled by the elements Ga to Kr?

Name: Which energy sublevel is being filled by the elements Ga to Kr?
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Elements Ga to Kr are located in the fourth period of the periodic table, indicating that they are filling the 4th energy level. Within this level, the first sublevel to be filled is 4s (with elements like calcium and scandium), followed by 3 sets of 4 orbitals in the 4p, 4d, and 4f sublevels. Ga to Kr are filling the 4p sublevel.

Which Energy Sublevel Is Being Filled by the Elements Ga