Convection inside stars of different mass

[Kenza]

Ok here are some facts.

1) Stars with mass less than 0.5 times the Sun's mass have uniform composition because they are fully convective from the core to the photosphere.

2) Stars with mass similar to the sun have the radiation zone inside the core while the convective zone envelopes the core. That's why there is no hydrogen in the photosphere but there is an abundance of heavier elements.

3) In stars 1.5 times the mass of the sun things are "upside down". Convection occurs inside the core while radiation is happens outside.

So, stars with lower masses have lower temperatures. Lower T result in higher opacity to radiation. So radiation cannot go in low mass stars.

Does this occur because at lower T atoms move slower so radiation cannot happen, so we have convection, it being a slower process. Right?

[Tiki]

A low-mass-star's interior never becomes ionized and is therefore too opaque for radiation to flow efficiently.

[cosmiquery]

My 'physics of stars' professor used to create stellar convection simulations and showed a bunch to our class. They looked very complicated, not nearly as neat and simple as you are describing. I believe he said magnetic fields and composition play a big part in determining convective behavior also, not just mass.