Each substance has particular physical and chemical properties due to the elements that it contains. Some compounds existed in various forms such as hydrated crystals, or allotropes such as graphite/carbon/diamond.
Ultimately it electron configuration as that is the "surface" it presents to the universe.
The thing that distinguishes one species from another on the genetic level is the genus because it is the level above species of the linnean system of clasification
Yes. A mixture contains different substances that are not chemically combined with one another. The parts of a mixture can be separated through physical means.
The number of protons (aka atomic number) determines the element or substance.
columuna
In a laboratory setting, spatulas are used for things like scraping substances from the insides of containers. They are also used to transfers substances from one container to another, and for spreading substances that have a thick texture.
There is one thing that distinguishes one animo acid from another. The only way to tell them apart is by the side chain.
Morphology of individual organism identifies and distinguishes one living thing from another.
properties
The thing that distinguishes one species from another on the genetic level is the genus because it is the level above species of the linnean system of clasification
Physical Characteristics
Trait is a characteristic that distinguishes one person from another and that causes a person to behave more or less consistently.
The topography is one characteristic that best distinguishes one landscape from another.
timbre
the lines on a map show were a continent ends
the number of protons
wavelength
color