Elements, Compounds & Counting Atoms

A substance that cannot be broken down into simpler substances and is made up of only one kind of atom.

A substance formed when two or more elements are chemically bonded together.

K is not a compound; it is an element.

It represents 1 atom of nickel and 2 atoms of fluorine.

An element consists of only one type of atom, while a compound consists of two or more different types of atoms chemically bonded.

Compounds have different properties than the elements that make them up.

H2O, which consists of 2 hydrogen atoms and 1 oxygen atom.

A combination of two or more substances that are not chemically bonded and can be separated by physical means.

It means that atoms are held together by chemical forces to form a compound.

Subscripts indicate the number of atoms of each element in a compound.