Chemical Names and Formulas

Atom

Basic unit of matter/element.

Can combine to form molecules.

Molecule

Made up of two or more atoms.

May contain one or more elemen.

Ions

“Charged Particles” formed when atoms or molecules gain or lose electrons. Charged atom.

Cation

Positive charged Ions. Forms when electrons are lost. Ex; (Na+)

Anion

Negative charged Ion. Forms when electrons are gained. Ex; (Cl–)

Compound

Substance made of two or more elements.

Molecular Compound

Compound made of nonmetal atoms that share electrons through covalent bond. It forms molecules.

A compound made of nonmetals bonded together by sharing electrons.

Ex; H₂O, CO₂

Ionic Bond

Elements = Metal + Nonmetal.

—The attraction between oppositely charged ions.—

Ex; Na⁺ and Cl⁻

Ionic Compound

Compound made of positive ions (cations) and negative ions (anions). Two to three elements.

The ions are held together or transfer the electron by electrostatic attraction.

Ex; “NaCl, MgO”

Covalent Bond

Elements = Nonmetal + Nonmetal

A bond formed when atoms share electrons.

Ex; The O–H bonds in H₂O