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Atomic Theory
The Atom
Elements
Arranging the Periodic Table
Grouping the Elements
100
British physicist who proposed the plum pudding model of the atom.
Who is J.J. Thomson?
100
Positively charged particle in an atom
What is a proton?
100
These elements are found on the left side of the Periodic Table
What are metals?
100
He discovered a periodic pattern among the elements.
Who is Dmitri Mendeleev?
100
This is the name for each column of elements on the periodic table.
What is a family or group?
200
in the current atomic model, this is the region where electrons are most likely to be found.
What are electron clouds or orbitals or shells?
200
Most of the atom's mass is found here
What is the nucleus?
200
Hydrogen has this number of valence electrons
What is 1?
200
This word means "happening at regular intervals"
What is periodic?
200
These elements have some properties of metals and some properties of nonmetals. They are also called semiconductors.
What are metalloids?
300
British physicist who discovered the nucleus using the gold foil experiment.
Who is Ernest Rutherford?
300
Because their mass is so small, these are not included in the atom's mass number
What are electrons?
300
Cl is the chemical symbol of what element?
What is chlorine?
300
The elements on the Periodic Table were originally arranged by this number
What is the atomic mass number?
300
The elements in Groups 3-12
What are the Transition Metals?
400
Greek philosopher who said that matter can be broken down into a piece that can't be divided called the atom.
Who is Democritus?
400
The mass number of an atom that has 6 protons, 6 electrons and 6 neutrons.
What is 12?
400
Group 16 has this number of valence electrons
What is 6?
400
Henry Mosely rearranged the Periodic Table using this number
What is the atomic number?
400
The elements of Group 18
What are Noble Gases?
500
Greek philosopher who believed that you could never end up with a particle of matter that could not be cut. Most people thought he was right.
Who is Aristotle?
500
Atoms of the same element can have different numbers of these
What are neutrons?
500
Pb is the chemical symbol of what element?
What is lead?
500
The law that states that the repeating chemical and physical properties of elements change periodically with the atomic numbers of the elements
What is periodic law?
500
All of the Actinides at the bottom of the Periodic Table have this in common
What is radioactive?