History
Who first named the atom?
Democritus
Subatomic particle that has a positive charge
Protons
This group will never combine with any other element naturally
Noble gases
The periodic number tells you ...
number of energy levels
The number of protons and neutrons is represented by the ...
mass number
First person to work on the periodic table
Mendeleev
The charge of a neutron
The most reactive metals
Alkali metals
metalloids
Isotopes are atoms of the same element with different numbers of _____.
neutrons
Came up with the model that says electrons travel in fixed orbits around the nucleus.
Bohr
The particles that make up protons and neutrons
The most reactive nonmentals.
halogens
Which number can be used to determine the identity of an element?
Atomic number
What noble gases does not have 8 valence electrons?
Helium
What experiment did Rutherford use to develop his Nuclear Model?
Gold foil Experiment
How many electrons can be held in the first energy level?
2
All elements in this group have 2 valence electrons
Alkaline earth metals
Hydrogen's most common isotype has ______ proton(s) and _____ neutron(s).
1 proton
0 neutrons
Draw a Bohr Model for the most common isotope of Sulfur.
Outer ring: 6 electrons
Middle ring: 8 electrons
Inner ring: 2 electrons
Sulfur has 16 p and 16 n
Explain JJ Thompson's Plum Pudding Model.
The atom is positively charged with negative particles embedded throughout
nucleus; protons and neutrons; electron cloud; electrons
This element is the only one in its group that belongs with the group # (due to having the same # of valence e-) but not with the group name (because it is a different classification)
This element has 4 energy levels and is one of the rare earth metals.
Scandium
Write the two types of isotope notation for the most common form of sodium in nature.
Sodium-23
23Na