The Nucleus: Crash Course Chemistry #1
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Electron
A negatively charged particle
Proton
A positively charged particle
Theory
A well tested explanation of natural events
Isotopes
Atoms of the same element with different numbers of neutrons
Atoms
Building blocks of matter
Albert Einstein
German physicist who developed the theory of relativity, which states that time, space, and mass are relative to each other and not fixed.
Neutron
Neutral charge
Atomic Number
Number of protons in an atom
Mass Number
the sum of the number of neutrons and protons in an atomic nucleus
Relative Atomic Mass
weight average of all isotopes of an element that reflects the abundance in nature. Not usually expressed as a whole number
