Atom History
Thought matter could NOT be divided and divided forever. Eventually there would be the "smallest particle." He named it "atomos."
Who is Democritus?
This subatomic particle has a positive charge?
Protons
These correspond to the number of energy levels or electron shells an atom may have.
What are periods?
Who is credited for the discovery of the proton?
Who is Ernest Rutherford?
He came up with the six part atomic theory.
Who is John Dalton?
Atoms from different elements have a different number of ______ in the nucleus.
What are protons
You can look at this to determine the number of valence electrons
group numbers in front of the "A"
Who is credited for the discovery of the electron?
Who is JJ Thompson?
He was the creator of the Plum Pudding model
JJ Thomson
These two subatomic particles are in the nucleus of an atom.
what are protons and neutrons?
What unit is used to measure weighted average atomic mass?
amu
Who is James Chadwick?
How you calculate neutrons.
What is mass - atomic number (protons)?
Name the Magnificent Seven.
F, Cl, Br, I, H, N, O
Which part of Dalton's Atomic theory was incorrect?
That atoms are indivisible.
What is another name for a positive ion?
Cation
This is the weighted average of the masses of the isotopes of an element
atomic mass
one-twelfth the mass of a carbon atom having 6 protons and 6 neutrons is where this unit comes from
atomic mass unit
Which scientist is most responsible for our current model of the atom, and what is our most current model?
Schroedinger, Electron Cloud Model