Unit 3 Vocabulary Flash Cards

Front

Atom

Back

The basic unit of matter; the smallest particle of an element that retains its chemical properties.

Front

Nucleus

Back

The center of an atom, containing protons and neutrons.

Front

Electron

Back

A negatively charged particle found in constant motion around the nucleus.

Front

Element

Back

A pure substance made of only one kind of atom.

Front

Isotope

Back

Atoms of the same element that differ in the number of neutrons.

Front

Ionic Bond

Back

A chemical bond formed when one or more electrons are transferred from one atom to another.

Front

Covalent Bond

Back

A bond formed when atoms share one or more pairs of electrons.

Front

Van der Waals Forces

Back

Weak attractions between molecules due to partial charges.

Front

Polarity

Back

A property of molecules with uneven distribution of charges; water has a positive and negative end.

Front

Hydrogen Bond

Back

A weak attraction between a hydrogen atom and another atom (often oxygen or nitrogen).