Can somebody help me pls pls pls pls pls

Explain which atom l or m is more stable and why

The p sub shell can hold up to 8 electrons in an atom. true or false?

Why does earth rotate? because earth is formed from cold gases collapsing due to gravity because the matter in the nebula that formed earth was spinning because earth forms more than 99% of the mass of the solar system because the hydrogen atoms inside the nebula fused to form helium