Periodic Table
Element square
Reactivity
Groups
Any
100
How many groups are there?
18
100
What is the top number called?
Atomic number
100
What is a chemical behavior of gain, lose, or share of electrons, that determines how elements react?
Reactivity
100
How many Valence Electrons in group 2?
2
100
How many Valence electrons in Group 15?
5
200
How many periods are there?
7
200
What is the Bottom number called?
Atomic mass number
200
What determines Reactivity?
Valence electrons
200
How many metalloids are there?
8
200
What is Group 18 called?
Noble Gases
300
Periods have these kind of properties the same.
Physical Properites
300
What does each square represent?
An element
300
How many electrons fill up the outer level?
8
300
What is Group 1 called?
Alkali Metals
300
What two groups are under the table?
Lanthanides and Actinide Series
400
The Periodic table is arranged by what?
Atomic Number
400
What does the atomic Number equal?
Number of Protons
400
How many electrons fill up the first level?
2
400
What is the man made group called?
Actinide series
400
How many Valence electrons in the Lanthanides series?
3
500
How many elements are there?
118
500
The atomic mass is what two particles added together?
Protons and Neutrons
500
What is a Valence Electron?
Outermost Electrons
500
Which group is never found uncombined in nature?
Group 17 the Halogens
500
What is Group 2 called?
Alkaline Earth metals
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