Show:
The Search for Order
Organizing Elements
What's in a Theory?
Modern Periodic Table
The Elements
100
French chemist who grouped elements into categories called metals, nonmetals, gases, and earths.
Who is Antoine Lavoisier?
100
Metals, nonmetals, and metalloids.
How are elements classified?
100
118
How many elements are in the modern Periodic Table?
100
Fe
What is iron?
200
17
How many element had been identified in 1750?
200
Good conductor of electric current and heat.
What are metals?
200
Valence electron
What is an electron that is in the highest occupied energy level of an atom?
200
Increasing atomic number
How are elments arranged on the Modern Periodic Table?
200
K
What is potassium?
300
A Russian chemist and teacher.
Who was Dmitri Mendeleev?
300
Eements that are poor conductors of heat and electric currents.
What are Nonmetals?
300
John Dalton
Who proposed that all matter is made up of individual particles called atoms?
300
Rows
What are Periods on the Periodic Table?
300
Cu
What is copper?
400
A deck of cards.
What model is the arrangment for Mendeleev periodic table?
400
Properties that fall between metals and nonmetals.
What are Metalloids?
400
The Gold Foil Experiment
What was the name of the experiment performed by Ernest Rutherford?
400
Group 1A
What group are Alkali Metals on the Periodic Table?
400
Au - Gold
What is Mrs. Wesley's favorite element?
500
Mendeleev arranged the elements into rows in order of increasing mass so that elements with similar properties were in the same column.
What is Mendeleev's proposal?
500
Less metallic and more nonmetalic in their properties.
What varies across a period from left to right?
500
Chlorine, Bromine, and Iodine.
What elements are a solid, liquid, or gas at room temperaure?
500
13
What is Mrs. Wesley's favorite atomic number?