Most of the volume of an atom is taken up by the , and most of the mass of an atom is found in the .

a. nucleus; electron clouds
b. nucleus; nucleus
c. electron clouds; nucleus

Which statement explains which component is likely to be more powerful in explaining a scientific phenomenon? a) component c, because a theory is often passed on possibility and not certainty b) component d, because a hypothesis is often based on possibility not certainty c) component c, because the ability to explain several occurrences in the natural world is a characteristic of a hypothesis d) component d, because the ability to explain several occurrences in the natural world is a characteristic of a theory