Pieces & Parts
By the Numbers
Table Manners
Identity Crisis
Misc
100
Protons
What particle has a positive charge?
100
2 electrons
What is the maximum number of electrons the first energy level can hold?
100
Periods
What are the horizontal rows of the periodic table called?
100
number of protons
What is the element identity determined by?
100
Oxygen & Sulfur
What are two elements with similar chemical properties & atomic structure?
200
Neutron
What particle has no charge?
200
8 electrons
What is the maximum number of electrons the second energy level can hold?
200
Groups or families
What are the vertical columns of the periodic table called?
200
Metals
What are solids at room temperature, malleable, ductile, and good conductors of heat & electricity?
200
Valence (outer) electrons
What do dot diagrams represent?
300
Electron
What particle has a negative charge?
300
Atomic number
What is the number of protons in an atom?
300
Periodic table
What is the chart called that classifies elements according to their properties & increasing atomic number?
300
Nonmetals
What are mostly gases at room temperature and poor conductors of electricity and heat?
300
Thompson's experiment
What led to the discovery of electrons?
400
Quarks
What are the particles of matter that make up protons & neutrons?
400
Mass number
What is the sum of protons & neutrons?
400
Decreases
What happens to metallic properties as you move from left to right on the periodic table?
400
mass location
What is the nucleus?
400
Tevatron
What is used to accelerate protons to study subatomic particles?
500
Electron cloud
What is the area around the nucleus where the electrons are most likely found?
500
neutral atom
What happens when the protons equal the neutrons?
500
One proton & one electron
What is added to each element as you go across the periodic table?
500
Isotopes
What are elements with the same number of protons but different number of neutrons?
500
Increasing atomic number
What is the modern (current) arrangement of the periodic table?
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