Neptune’s volume is more then 50 times as great as that of earth. True or false

When many atoms are split in a chain reaction, a large explosion occurs. this is an example of what type of energy conservation

Often called simply "velocity," this is the velocity of an object at a particular moment in time.

Which statement is the best definition of an atom? a) anything that has mass and occupies space. b) the smallest particle that has the properties of an element. c) a substance that cannot be broken down chemically into simpler substances. eliminate d) the smallest unit of a substance that exhibits all of the properties characteristic of that substance.