Question

What does the aufbau principle suggest about electron configuration?

Electrons within the same atomic orbital have different spins.
Electrons occupy orbitals with the lowest energy first.
No more than two electrons can occupy the same atomic orbital.
Filled sublevels are more stable than partially filled sublevels.

Answer 1

It is Filled sublevels are more stable than partially filled sublevels.

Step-by-step explanation:

Just took the test and this was right.

Answer 2

Electrons occupy orbitals with the lowest energy first.

Step-by-step explanation:

The Aufbau Principle states that electrons will fill the atomic orbitals with the lowest energy levels first, before occupying others with higher energy levels.

For example, electrons will fill the 1s orbital before filling the 2s orbital.