Transcript Slide 1 - TeacherWeb

_______
in a group are similar
because the atoms have the same #
of _______ in their ____ energy
levels
Atoms will _____, _____ or
_______electrons with each other
in order to have a complete set of
electrons
Elements that undergo this process
are called _________
Contains _______
1 electron in the outer level
Soft enough to cut with a knife
Silver color, shiny, low density
_____ ______, react with water to form hydrogen gas
Most reactive metals because they can easily give away
the one outer shell electron
 So reactive that in nature they are
___________________.
 Cmpds. formed from them are very useful
 Ex.-Sodium Cholride-Table salt, Potassium BromideUsed in photography
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___ electrons in outer level
Very reactive, but less reactive than
alkali metals
More difficult for atoms to give 2
electrons than 1 when joining with other
atoms
Other properties: _____ _____, higher
densities than alkali metals
Magnesium for airplanes, _______ for
cement, chalk and you!
 __ or ____ electrons in the outer level
 Less reactive than alkaline-earth metals
 Other properties: Shininess, _____ conductors of
thermal energy and electric current, higher
densities and MP than elements in Groups 1 and 2
(except _________-liquid @ room temp.)
 Many are ______-not all-Gold is an example
 Some are reactive and some are not that reactive
 ________ & ________: placed below the table so
the table is not so wide
 Elements after _____ are made in labs
 ________ used in smoke detectors, Mercury used
for thermometers
• This group contains one metalloid and four
________
• ___ electrons in the outer level
• They are reactive
• They are _____ at room temp.
• Most common element is ________-most
metal found in the Earth’s crust
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Contains 1 nonmetal, 2 metalloids and 2 metals
____ electrons in the outer level
The reactivity ______ among the elements
_______ at room temperature
Example of a nonmetal in the Carbon group:
________: hardest material known. _____:
formed from burning oil, coal and wood.
Both are natural forms of Carbon
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Contains 2 nonmetals, 2 metalloids and 1 metal
__ electrons in the outer level
Reactivity varies among the elements
Solid at room temp. except for _______ (it is
a gas) _____ of the air you breathe
Nitrogen-not very reactive but Phosphorous is
extremely reactive (striking a match)
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Contains 3 nonmetals, 1 metalloid, and 1 metal
___ electrons in the outer level
These elements are reactive
All but _______ are solid at room temp.
Oxygen makes up about _____ of the air you
breathe.
Sulfuric acid (compound) used in chemical
industry
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Contains ________
____ electrons in the outer level
Very reactive because their atoms only need
to gain only 1 atom to have a complete outer
level
______ conductors of electric current,
violent reactions with alkali metals to form
salts, never in uncombined forms in nature
Chlorine and Iodine used as __________
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Contains _________
___ electrons in the outer level (except
______ which has 2)
_______ elements-full set of electrons in
their outer level
Colorless, odorless gases at room temp.
These are useful gases-argon: lightbulbs,
helium: makes blimps and weather balloons
float
 1 electron in the outer level
 Hydrogen is ________
 Properties of H do not match any other group so it is set
apart.
 Colorless, odorless gas at room temp., low density, ______
reaction with oxygen
 Can give away one electron when they join with other atoms.
 Physical props. of hydrogen are more like nonmetals than
metals.
 Hydrogen is found in _______. Most abundant element in the
_________.
 Useful in _____ _______ because it is so reactive