Which atoms are most likely to form + 1 ion and -2 ion respectively? a. Sr and S
b. Kand o
C. Fe and N
d. Ba and F

Nuclear fusion is the source of energy for stars. besides hydrogen, which other element is most likely also common in stars?

The characteristics of two different types of reactions are shown below: reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of an element. which statement is true about the atoms of the elements that participate in the two reactions? their identity changes in both reaction a and reaction b. their identity changes in reaction a but not in reaction b. their identity changes in reaction b but not in reaction a. their identity remains the same in both reaction a and reaction b.

Which of the following is true about the speed of light? it depends on the wavelength.