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periodic table
Metals
Reactivity
100
Number of protons in the nucleus is the same as the
What is the atomic number
100
A mixture of two or more metals
What is an alloy
100
Which group contains the most reactive elements?
What are alkali metals?
200
a horizontal row of the periodic table is called
What is a period
200
A substance that transmits heat or electricity easily
What is a conductor
200
The ease and speed with which an element or compound combines with other elements and compounds.
What is reactivity?
300
He developed the first Periodic Table
What is Dmitri Mendeleev
300
The gradual wearing away of metal elements due to a chemical reaction.
What is corrosion?
300
In what group could you find the alkali metals?
What is group one?
400
Reason Mendeleev left spaces on the periodic table.
What is undiscovered elements
400
A term used to describe a material that can be pulled out into a long wire.
What is ductile?
400
The properties of a compound are the same or different from the elements that form it.
What is different?
500
Hydrogen is an example of this
What is a gas
500
A term used to describe material that can be hammered or rolled into shape.
What is malleable?
500
Copper turns this color when it is exposed to the elements
What is green?