<meta http-equiv="refresh" content="1; url=/nojavascript/">
Dismiss
Skip Navigation
You are viewing an older version of this Concept. Go to the latest version.

Atoms to Molecules

Matter is made of particles, such as subatomic particles, atoms and molecules.

%
Progress
Practice
Progress
%
Practice Now
Atoms to Molecules
Loading... 

Vocabulary

atom

atom

The smallest unit of a chemical element.
atomic mass

atomic mass

The number of protons and neutrons in an atom.
electron

electron

Tiny negatively charged particles that orbit the nucleus.
element

element

Pure chemical substance that cannot be broken down into other types of substances; consists of one type of atom.
isotope

isotope

A chemical element that has a different number of neutrons.
molecular mass

molecular mass

The sum of the masses of all of the atoms in a molecule.
molecule

molecule

The smallest unit of a compound; it is made of atoms.
neutron

neutron

A neutral particle in the nucleus of an atom.
nucleus

nucleus

The center of an atom, made of protons and neutrons.
proton

proton

A positively charged particle in a nucleus.

Image Attributions

Reviews

Please wait...
Please wait...

Original text