Help me please. Any help will be apprciated

Which object forms when a supergiant runs out of fuel? a red giant a black hole a white dwarf a neutron star

Which three statements represent the benefits of performing experiments using computer simulations?

Question 3(multiple choice worth 4 points) (04.04 lc) what does it mean when an element is reduced? it empties a valance shell, reducing its atomic radius. it gains electrons, reducing its overall charge. it increases electronegativity, reducing its ability to bond. it loses electrons, reducing its electron number.