Which type of substance is made of only one kind of matter and has definite properties?
an atomic substance
a chemical substance
a molecular substance
a pure substance

(apex) when a cup of water is dropped, as the cup falls, the water in the cup falls out true or false?

Alidded glass container is filled with a colored gas. after a period of time, it is observed that the gas is uniformly spread throughout the box and that the movement has slowed considerably. next, a warm iron plate is carefully placed under the box. why is there resumed movement of the gas in the container?

Categorize them by metal, nonmetal, in periodic tableductilenon-ductilemalleableoften gain electrons easilygood conductorpoor conductorcan be liquidselements