How is weight affected by the location?

Which of the following statements about hybrid orbitals is or are true? choose all that apply. choose all that apply. under sp2 hybridization, the large lobes point to the vertices of an equilateral triangle. after an atom undergoes sp hybridization there is one unhybridized p orbital on the atom. the angle between the large lobes of sp3 hybrids is 109.5∘

If anyone would be able to me out with these three questions it would be these are from the chem 2202 course.

What does the symbol (–hfus) indicate in a phase change?