FLASHCARDS
Chapter 2.1 (Textbook pages 28-31)
9 Vocabulary Terms
Definitions
Atom
The basic unit of matter
Nucleus
The center of an atom, which contains protons and neutrons
Electron
A negatively charged particle; located in the space surrounding the
nucleus.
Element
A pure substance that consists entirely of one type of atom
Isotope
One of several forms of a single element, each of which contains the
same number of protons but different numbers of neutrons
Compound
A substance formed by the chemical combination of two or more
elements in definite proportions
Molecule
The smallest unit of most compounds that displays all the properties of
that compound
Water
H2O
Carbon dioxide
CO2