History of the Atom
Discovered the electron- called his model- plum pudding
Who is J.J. Thomson?
These determine the identity of an element.
What is the proton?
What is an electron?
The atomic number is the number of _______.
What is the proton?
These are good conductors, malleable, and on the left of the periodic table.
What are metals?
First in atomic theory- all atoms of one element the same- billiard ball model
Who is Dalton?
This particle is counted in the mass and is neutral.
What is a neutron?
These are different for isotopes.
What is a neutron?
These determine the atomic mass.
What are protons and neutrons?
Poor conductors, usually gases, on the right side of the periodic table.
What are non-metals?
In his "gold foil" experiment he discovered the nucleus and that the atom is mostly empty space.
Who is Rutherford?
This orbits the nucleus and is negative.
What is the electron?
A positive ion.
What is lose electrons?
How you find the number of neutrons.
What is subtract the Atomic # from the Atomic Mass?
This group is most reactive-only one valence electron.
What are the alkali metals/group 1?
He added shells or orbitals/energy levels.
Who is Bohr?
These are counted in the mass and located in the nucleus.
What are protons and neutrons?
What is a negative ion?
The valence electrons.
What is the group number?
These have properties of both metals and non-metals.
What are metalloids?
What is the cloud model?
What are electrons and protons?
If Carbon 12 gains a neutron.
What is Carbon- 13.
The number of energy levels or shells.
What is the period number?
This group is not reactive- they have a full valence shell.
What are the noble gases/ group 8?