Atomic Structure Flashcards

Front

Matter

Back

Anything that has mass and takes up space.

Front

Atom

Back

Basic unit of matter; the smallest particle of an element

Front

Element

Back

A pure substance made of only one kind of atom; it cannot be broken down into a simpler substance.

Front

Nucleus

Back

Center of an atom; contains protons and neutrons.

Front

Proton

Back

A subatomic particle that has a positive charge and is found in the nucleus of an atom; it has a mass of 1 a.m.u.

Front

Neutron

Back

A subatomic particle that has no charge and is found in the nucleus of an atom; it has a mass of 1 a.m.u.

Front

Electron

Back

A subatomic particle that has a negative charge and negligible mass.

Front

Energy level

Back

A region of an atom where electrons with the same energy are likely to be found.

Front

Isotope

Back

Atoms of the same element that have different numbers of neutrons, and therefore different masses.

Front

Bohr model

Back

Model of the atom in which electrons move rapidly around the nucleus in different paths called energy levels.