How small is an atom? Parts of the Atom What do the numbers mean? Atomic Structure How small is an atom? Parts of the Atom What do the numbers mean?

Atomic Particles Particle Charge Mass # Location Electron -1 Electron Cloud Proton +1 1 Nucleus Neutron

What is an atom made up of? Atomic Particles: Proton Identifier for the atom, keeps electrons attached to the atom Slightly smaller than the neutron Neutron Stabilize the atom Slightly larger than the proton Electron Allowing for atoms to bond to other atoms Smallest of the 3 subatomic particles

What do the numbers and letters on the periodic table mean? Atomic Number Atomic Symbol Element Name Atomic Mass

Atomic Number This is the number of protons in the nucleus, of an atom…. ALWAYS! Think of it like an atom’s DNA It is what makes an element an element It also tells you how many electrons are in a STABLE atom. Protons = electrons in stable atoms ATOMIC NUMBER

Atomic Mass Is the number of protons PLUS the number of neutrons in the nucleus of an atom. Unit is Atomic Mass Units (AMU’s) Atomic Mass