Discovering the Atom
Defined as an uncuttable or indivisible part of matter
The Atom
This subatomic particle has a positive charge
Proton
The letters assigned to each element on the periodic table
Chemical symbol
H
Hydrogen
This holds subatomic particles in the center of an atom
Nucleus
Atoms exist in these states of matter
Solids, Liquids, Gases
This subatomic particle has a neutral charge
Neutron
The numbers on the periodic table are called this
Atomic Number
C
Carbon
These are the two subatomic particles in the center of the atom
Protons, Neutrons
Person who came up the theory that an uncuttable matter existed
John Dalton
This subatomic particle has a negative charge
Electron
This number is usually found rounded to the thousandths place on the table
Atomic Mass
He
Helium
These orbit around the center, from great distances
Electrons
Brilliant mathematician who calculated the approximate size of an atom
Albert Einstein
This subatomic particle is the lightest of the particles
Electron
This is how many elements are on the periodic table
118
Element #11
Sodium
This is the number of electrons that can orbit in the first shell
2
The type of microscope used to prove the existence of atoms
Scanning Tunnel Microscope
These two subatomic particles are the heaviest of the particles
Protons and Neutrons
How can you use atomic mass to find the number of neutrons
Subtract the atomic number or protons/electrons
Element #19
Potassium
This is what happens if a shell can’t hold more electrons
They go into the next shell