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WorksheetsPeriodic Table
Total questions: 9
Worksheet time: 5mins
Name
Class
Date
1.
_______________________ _______________________ discovered a pattern to the elements in 1869.
a)
Mendeleev
b)
Democritus
c)
Moseley
d)
Rutherford
2.
What are the three properties the elements were organized by originally?
a)
Metals, nonmetals, metalloids
b)
increasing atomic mass
c)
atomic number
d)
density, appearance, and melting point
3.
After playing chemical solitaire, the elements were eventually organized by atomic _____.
a)
mass
b)
number
4.
In 1914, which scientist determined the number of protons in an atom?
a)
Moseley
b)
Democritus
c)
Thomson
d)
Mendeleev
5.
Moseley eventually rearranged the periodic table by ______ _______, instead of by atomic mass.
a)
atomic mass
b)
atomic number
c)
mass number
d)
chemical symbol
6.
Elements are classified according to their properties as __________, __________ and __________.
a)
density, appearance, and melting point
b)
metals, nonmetals, and metalloids
7.
A ______________ is each horizontal row of elements (from left to right) on the periodic table.
a)
group
b)
period
c)
periodic law
d)
metalloid
8.
Each vertical column of elements (from top to bottom) on the periodic table is ________.
a)
Group
b)
Period
c)
Periodic Law
d)
Metalloid
9.
The ____ law says repeating chemical/physical properties change w/ the elements’ atomic numbers
a)
Periodic
b)
Period
c)
Group
d)
Metal
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