Teaching BPSC 4.0 बिहार उच्च माध्यमिक शिक्षक भर्ती (PGT) Mock Test General Science Chemistry Structure of Atom
The Aufbau Principle states that...?
1
only two electrons can occupy an orbital
2
electrons enter the lowest available energy level
3
electrons remain unpaired if possible
4
More than one of the above
5
None of the above