Patterns
Parts
Stuff
Metals
Families
100
The average mass of one atom an element.
What is atomic mass?
100
The inside core of the atom.
What is the nucleus?
100
Electrons that are farthest out that can be shared or transferred.
What are valence electrons?
100
A material that can be pounded into shapes.
What is malleable
100
Metals that are so reactive that they are never found uncombined in nature and have only one electron in their outside layer?
What are alkali metals?
200
He noticed that patterns appeared when the elements were arranged in order of increasing atomic mass.
Who is Dmitri Mendeleev?
200
Three particles in an atom.
What is a proton, electron and neutron?
200
One or two letters that represent the name of an atom.
What is a chemical symbol?
200
A material that can be pulled out, or drawn into a long wire.
What is ductile?
200
Most reactive nonmetals.
What are the halogens?
300
Arrangement of elements by characteristic properties and increasing atomic number.
What is the Periodic Table?
300
The number of protons in an atom?
What is the atomic number?
300
Molecules of two identical atoms.
What is a diatomic molecule?
300
Materials that transmit heat and electricty.
What is a conductor?
300
They do not ordinarily form compounds with other elements.
What are the noble gases?
400
A regular, repeating pattern.
What is periodic?
400
Vertical columns organized by similar charaqcteristics.
What is a group or family?
400
Elements that have some of the characterictics of metals and some of nonmetals.
What are metalloids?
400
Materials that are atracted to magnets or can be made into magnets.
What is magnetic?
400
They form a bridge between the very reactive metals on the left side of the table and the less reactive elements on the right.
What are the transition metals?
500
Four important facts found on each square of the periodic table.
What is atomic number, element symbol, element name and atomic mass?
500
Each horizontal row across the table.
What is a period?
500
Substances that under some conditions can carry electricity?
What is a semiconductor?
500
A mixture of metals.
What is an alloy?
500
The elements at the bottom of the table known as the rare earth elements.
What are the lanthanides and actinides?
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