Hich of the following properties of an unknown substance would allow it to be classified as a pure substance? The unknown substance –

is not able to conduct any electric current.

has an overall density greater than that of water.

consists of a solid dissolved in distilled water.

is composed throughout of one and only one element.

neutrons are in the middle of the atom and the electrons, which are much smaller.

a plasma is a warm ionized gasoline consisting of approximately equal numbers of definitely charged ions and negatively charged electrons. the characteristics of plasmas are notably unique from the ones of ordinary neutral gases in order that plasmas are considered a awesome "fourth kingdom of remember."

smooth muscle is composed of involuntary muscles found within the walls of organs and structures such as the esophagus, stomach, intestines, and blood vessels. those muscles push materials like food or blood through organs. unlike skeletal muscle, smooth muscle can never be under your control.