Who did what now
The man who discovered the electron with a Cathode Ray Tube
Who is Thomson
Value on the periodic table that tells you the number of protons
Atomic Number
Has a positive charge and is fond in the nucleus of the atom
Proton
When the protons equal the electrons
Neutral (0 also accepted)
The 1-2 letter abbreviation for an element given on the periodic table
Chemical Symbol
Was the individual scientist who had the most accurate model of an atom
Bohr
The mass of a single proton or neutron
1 amu
Has a mass 1/1840 th of the other two subatomic particles
Electron
When there are two more electrons than protons
-2
The electrons on the outermost shell of a model of an atom
Valence Electrons
Said that all atoms of an element are exactly the same
Dalton
protons + neutrons
Mass Number
The most difficult and last subatomic particle to be discovered
Neutron
When there are 14 protons, 14 neutrons, and 12 electrons
2
The vertical columns on the periodic table that lump elements together by shared/similar characteristics
Groups/Families
Said that an atom is mostly empty space with dense, positive charge at center (nucleus), and named the charges protons
Rutherford
The name of atoms of the same element with different numbers of electrons
Ions
Is found in the nucleus of an atom and contributes to mass but not charge
Neutron
If a carbon atom had 16 electrons
-10
smallest particle that can still be considered an element
atom
discovered a set of patterns that applies to all elements
Mendeleev
The average of the mass numbers of all isotopes of an element
Atomic Mass
Atoms with the same number of protons and different number of neutrons
Isotopes
When you have an atom that is the ion to an atom with an equal number of protons and electrons
Not Zero
The original way the periodic table was organized and the new way the periodic table is organized
Atomic Mass and Atomic Number