History
Structure
Groups
Periodic Table
Grab Bag
100
Who first named the atom?
Democritus
100
Subatomic particle that has a positive charge
Protons
100
This group will never combine with any other element naturally.
Noble gases
100
The period number tells you…
Number of energy levels
100
The number of protons and neutrons is represented by the…
Mass number
200
First person to work on the periodic table
Mendeleev
200
The charge of a neutron
0
Neutral
200
The most reactive metals.
Alkali metals
200
The semi-conductors on the periodic table are classified as…
Metalloids
200
Isotopes are atoms of the same element with different numbers of ________
neutrons
300
Came up with the model that says electrons travel in fixed orbits around the nucleus
Bohr
300
The particles that make up protons and neutrons
Quarks
300
The most reactive nonmetals.
Halogens
300
Which number can be used to determine the identity of an element?
Atomic number
300
What noble gas does not have 8 valence electrons?
Helium
400
What experiment did Rutherford use to develop his Nuclear Model?
Gold foil experiment
400
How many electrons can be held in the first energy level?
2
400
All elements in this group have 2 valence electrons.
Alkaline earth metals
400
Hydrogen’s most common isotope has ____ proton(s) and ______ neutron(s).
1 proton
0 neutrons
400
Draw a Bohr Model for the most common isotope of Sulfur.
500
Explain JJ Thomson’s Plum Pudding Model.
The atom is positively charged with negative particles embedded throughout
500
The mass of an atom is in the _______ where the ________ are.
The volume of the atom is in the _______ where the _________ are.
The mass of an atom is in the nucleus where the p+ and n0 are.
The volume of the atom is in the electron cloud where the e- are.
500
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)
Hydrogen
500
This element has 4 energy levels and is one of the rare earth metals.
Scandium
500
Write the two types of isotope notation for the most common form of Sodium in nature.
Sodium-23
23Na