Sp3. I just took a quiz exact same question and the answer was that I don't know how to get it sorry.
1.) A compound is a substance that originates from two or more separate elements. It shares some similarities with a mixture.
2.) A compound has quite different properties from which it was formed. It also cannot be separated easily. Compounds are formed by chemical reactions.
3.) A pure substance has a constant composition and has consistent properties. It can be a compound or an element, but its composition is constant.
Hope this helps. :)
Varuable, In algebra, a symbol (usually a letter) standing in for an unknown numerical value in an equation :)
Answer:
Because the number of subatomic particles is finite.
Explanation:
You probably know that in addition to electrons, protons, there are many other subatomic particles with strange names like quarks, neutrinos, muons, bosons, etc.
There are many ways in which these could theoretically be combined to make atoms of new elements.
However, the number of different subatomic particles is finite, so the number of possible combinations is also finite.
Even if scientists discover more new subatomic particles, the number of possible combinations will increase, but it will still be finite.
Thus, there is a finite number of elements in the universe.