Answer;
-Pure chemical substance and element
Explanation;
-Pure substances are substances that are made of only one type of atom or molecule.A pure substance can be either an element or a compound, but the composition of a pure substance doesn’t vary.
-An element is a pure substance that cannot be broken down into different types of substances by chemical means. All elements are pure substances. An element is composed of a single kind of atom. An atom is the smallest particle of an element that still has all the properties of the element.
-Tungsten is an element and therefore a pure substance.
If the environment changes quickly and no individual members of a species are able to survive in the new environment, then the species will become extinct in that environment
Answer:
9 brains
Explanation:
No explanation, but you can fact check this by looking it up :)
The answer is binomial nomenclature , also called binary nomenclature
