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WorksheetsHistory of the Periodic Table
Total questions: 12
Worksheet time: 12mins
Dmitri Mendeleev arranged the 63 known elements at the time by __________________.
atomic number
atomic mass
neutron number
none of the above
Why did Dmitri Mendeleev leave spaces i his periodic table?
He left spaces for undiscovered elements.
He left spaces for discovered elements.
He left spaces to be more organized.
none of the above
The modern periodic table is organized by the number of __________ atomic number.
decreasing
increasing
constant
Scientists like things organized
make it easier to understand the elements
have one list of the known elements.
none of the above
A ___________ is an arrangement of elements in columns.
columns
rows
periodic table
electron shell
The vertical (up and down) columns in the periodic table are called
groups
towers
periods
atomic numbers
The horizontal (side to side) rows in the periodic table are called
groups
families
periods
atomic numbers
Which classification of elements are shiny, silvery solids and good conductors of heat and electricity?
Transition metals
Metalloids
Nonmetals
Metals
Which classification of elements are gases or dull brittle solids and poor conductors?
Transition metals
Metals
Nonmetals
Metalloids
What is the chemical symbol for carbon?
C
Ca
Cn
Crn
