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32 Cards in this Set

  • Front
  • Back
Mendeleev arranged the elements by...
increasing atomic mass (he was wrong)
Mosely arranged the elements by....
increasing atomic number. (he was right)
The periodic law says...
physical and chemical properties of elements are periodic functions of their atomic numbers
Other stuff about Mendeleev
he left blank spaces in the table and predicted where elements would be
Columns go up and down. They are called:
groups or families
Elements in groups have...
similar but not idenitical properties
The horizontal rows are called
periods (they go side to side)
The elements in a period are...
not alike in properties
The first element is a period is...the last element is....
1st element is an active solid. Last element is an inacitve gas
Each square in the periodic table tells you:
the atomic number, chemical symbol, name, and atomic mass
the atomic number tells you...
the number of protons
Name some physcial properties of metals
luster (shiny), ductile (drawn into wires), malleable (hammered into sheets)
chemical properties of metals depend on....
the number of electrons in the outermost energy level
is a chemical propety of metal. Corrosion is the gradual wearing away of a metal due to a chemical reaction
examples of corrosion
iron rusting and silver tarnishing
where are metals on the periodic table?
to the left of the zig zag line on the table
where are nonmetals found on the periodic table
to the right of the zig zag line
what are the physical properties of nonmetals
no luster. dull. brittle. do not conduct electricity
what has lower melintg points and densitites...metals or nonmetals?
metals _____ electrons when they form compounds
nonmetals _________ electrons when they form compounds
the elements on the zigzag line are called
descirbe metalloids.
have properties of both metals and nonmetals.
elements in the same family have similar properties becuase they have the same number of....
valence electrons
family 1 is called
alkali metals
alkali metals...
have 1 valence electron, are good conductors of electricity, and bond easily
examples of alkali compounds
table salt and baking soda
family 2 is called
alkali earth metals
alkali earth metals...
are not quite as reactive as alkali metals. Magnesium and calcium are examples
transition metals
are between families 2 and 13. examples are iron, cobalt, silver, and gold
family 13
called boron family
family 14
carbon family