What determines whether an Atom is stable (unreactive) vs unstable reactive?

Which of these statements are true about scientific theories and hypothesis

Heat from earths interior and pressure from overlying rock transform the remains of marine sediments into

Ras is a g-protein that is activated when a growth factor attaches to egfr. its activation results in the replacement of a gdp molecule with a gtp molecule, thus allowing a signal transduction pathway to be activated. considering the signal pathway illustrated on this page, what is one potential outcome of a mutation in the ras gene that leads to ras protein hyperactivity. be specific.