According to Aufbau's principle, which of the three 4d, 5p and 5s will be filled with electrons first

According to Aufbau's principle, which of the three 4d, 5p and 5s will

1.	According to Aufbau's principle, which of the three 4d, 5p and 5s will be filled with electrons first
Answer» 4D 5p 5s 4d and 5s will be filled simultaneously Solution :According to the Aufbau's PRINCIPLE, electron will first ENTERS in those ORBITAL which have least energy . So decreasing ORDER of energy is 5p gt 4d gt 5s