Chemistry 2nd vocab test

attract

to pull towards

repel

to push away

cathode ray tube

the device used in the discovery of the electron

electrodes

the point at which an electric current enters or leaves something, for example, a battery

cathode ray

a beam of electrons emitted by the cathode of an electrical discharge tube

neutral

when a particle has no charge.

subatomic particles

the tiny particles that atoms are made of

elements

the simplest form of matter. cannot be broken down into other substances

compound

a substance that contains 2 or more elements joined together. can be broken down into elements.

atoms

tiny particles that make up elements

nucleus

the central part of an atom

proton

particle with positive charge

mixture

a substance consisting of two or more substances mixed together

electrons

particles that flies around a nucleus. they have a negative charge

charge

the physical property of matter which causes it to experience a force when placed in an electromagnetic field

atomic theory

a theory of the structure of the atom

neutron

a particle with no charge