Chemistry L1

Atoms

the basic units of matter made up of subatomic structures

neutrons

the center of the atom composed of protons and neutrons holding most of the atom’s mass

Electron Cloud

the outer part of the atom, where electrons are most likely to be found

Atomic number (Z)

the number of protons in an atom

Periodic table

organizes elements according to their atomic number

chemical symbol

a one or two letter abbreviation for an element on the periodic table

Protons

positively charged particles in the nucleus that determine and atoms identity

Neutrons

Neutral particles in the nucleus that contribute to an atoms mass

Isotopes

atoms with differing num

Electrons

Negatively charged particles that move around the nucleus and control how atoms interact with eachother

Mass number

Mass= # protons + # neutrons

number of neutrons

Mass number - Z