Question

9cw1
the outermost s orbital of an atom contains two electrons.
always true
sometimes true
never true

Explanation:

In some atoms like Mg (1s²2s²2p⁶3s²), the outermost s orbital has 2 electrons. But for H (1s¹), the outermost s orbital has 1 electron. So it's not always true.

Answer:

Sometimes true