Elements, compounds, mixtures, etc.

By: Meredith Pratt


Definition: A substance that cannot be broken down by chemical means.


Definition: A chemical bond that is formed when two or more atoms join together chemically.

What happens to an element's properties when it forms a compound?

When an element is used in a compound, its properties are drastically changed. The properties from the original element are left behind when the compound is formed.

How are compounds formed?

Compounds are formed from simpler substances by chemical reaction.

How are compounds separated? Can elements be separated?

You can separate a compound by breaking the bonds between the atoms.

Elements on the other hand, are pure substances. They can't be further broken down.

Difference between Element and Compound?

An element is an atom or molecule made of a single type of atom.

A compound is a molecule made of two or more different elements.

Chemical formula: a representation of a substance using symbols for its constituent elements.

What are coefficients and Subscripts?

A coefficient is a number placed in front of a term in a chemical equation to indicate how many molecules/atoms take part in the reaction.

A subscript is the number of atoms in the preceding element.

How to count elements and atoms in a chemical formula-

Find out which elements are in the chemical's formula (they are represented by their symbol.) Then you see how many atoms/molecules of that element there are by checking the coefficients and subscripts.