On earth, hydrogen and helium are naturally found as gases. why are they liquid on the outer planets?

The pressure from the gravitational forces of the massive planets.

Explanation:

i just answered it

b) mutualism

hope this : )

the number of protons in the nucleus of a given element. has slight luster and conducts electricity at high temperatures like metal.but like a nonmetal,boron is brittle and does not conduct electricity well at low temperatures. in graphite, carbon is a soft,brittle solid.it is reflective,ductile,or malleable.