Flashcards: Chemistry Definitions

Smallest indivisible particle of an element

An element’s number, determined by how many protons it has

The production of a new substance from a chemical reaction

Involves creating new products from the existing reacting chemicals. When a chemical reaction occurs a new substance is always produced.

Made from a combination of atoms from different elements.

A model of an atom that shows how the electrons are organized on different shells

a collection of orbiting electrons. Each shell can contain a maximum number of electrons.

sub-atomic particle with a negative charge that orbits the nucleus

a pure substance composed of only one kind of atom

an atom that has gained or lost electrons and so is no longer neutral

substances made of more than one type of particle mixed together

smallest indivisible particle of a compound

sub-atomic particle with no charge that lies within the nucleus

A table listing all the known elements, arranged according to their atomic properties

Does not create a new substance. While the substance might change its state, size, shape, temperature, or amount, it still remains the same substance.