Chemistry and biology

Substance

Anything that has matter and takes up space

The chemical bond that holds the the elements together is an

Covalent bond when electrons are shared

The substance that cannot be broken down into other substances is an

Element

Compounds

Fixed ratio two or more electrons are combined chemically and physically different cannot be broken down

Two of these oppositely charged atoms can form an electrical attraction called an

Ionic bond

An atom that has lost or gained one or more electrons becomes an

Iron which carries an electric charge

Carbon-14 is a

Isotope

Nucleus

Located at the center of the atom

A substance with this kind of bond is called a

Molecule

Electron

Particles negatively charged

Neutron

Particles with no charge

Proton

Positively charged particles

The chemical compound in your toothpaste helps protect your teeth from decay. The formula of this compound is na2PO3F. Use the periodic table in your book to identify each element in this compound

Sodium phosphorus oxygen fluorine

An attraction between oppositely charged regions of molecules is called and

Van Der waals Force

It has a

Compound forms when two or more elements combine

Atom

Building blocks of matter