History
Terms and Definitions
Structure
Electronegativity
Organization
100
Who organized the first periodic table by chemical properties and atomic mass in 1871?
Dmitri Mendeleev
100
What is the weighted average mass of all isotopes of an element?
Atomic mass
100
What is represented by the orange column on the right?
Noble Gases
100
What is the greatest electronegativity and most reactive nonmetal?
Fluorine :)))
100
A vertical column in the periodic table is called?
Groups :max_bytes(150000):strip_icc()/chemcat_argon-58b5ae0f5f9b586046ad469b.jpg)
200
Who determined the atomic number of elements?
Henery Moseley
200
What is the measure of the tendency of an atom to attract a bonding pair of electrons?
Electronegativity
200
What does the red column represent?
Alkali Metals
200
What type of electronegativity trend is represented by the arrows?
Ionization energy
200
A horizontal row in the periodic table is called a?
Period!!!!!
300
Define - "When the elements are arranged in order of increasing atomic number, there are patterns in their chemical and physical properties."
Periodic Law
300
What is the inner electrons barrier called when the outer electrons are shielded from the pulling of the nucleus?
Shielding Effect
300
What is located in the "stair steps"?
Metaloids
300
What id increasing with the arrows?
Atomic Size
300
How is the modern periodic table arranged?
By atomic number
400
who grouped together elements based on properties? (gases, non-metals, and metals)
Lavoisier
400
What is it called when the periodic table shows patterns and trends?
Periodic 
400
What is represented by the two horizontal rows at the bottom of the table?
Inner Transition Metals
400
True or False?
Small atoms = high ionization energy
400
What group has the outermost S and P full?
Noble Gases
500
who incorporated transition metals into the periodic table?
Meyer
500
What is the measurement of the size of an atom from the center of the nucleus to the edge of the electron cloud?
Atomic Radius
500
What is represented by the light blue section in the center of the table?
Transition Metals
500
What is the energy required to remove an electron from a gaseous atom?
Ionization energy
500
What group has the outermost S and nearby F containing electrons?
Inner Transition Metals