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32 Cards in this Set

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  • Back
A substance made up of only one kind of atom.
Element
The smallest unit of an element that has all the properties of that element
Atom
Each element has a ______ number which is the number of protons in one atom of that element.
atomic
Most matter cont ains only a few kinds of
elements
A hamburger, gasoline, and paper are all made up of only three elements
carbon,hydrogen, oxegyn
Two or more atoms linked together
Molecule
One fourth of the elements are ______ .
Metals
Metals except _______ are ______ at room tempature.
mercury, SOlid
Most metals can be hammered or rolled in to sheets.
Malleable
Most metals that can be formed in to wires
Ductile
the electrons fathest from the nuclues of a metal atom are free to move to other metal atoms this allows for the transfer of electricity
Conduct Electricity
electrons in other items such as plastic don't conduct electricity there are
insulators
Metal gets hotter than plastic
Conduct heat
A mixture of two metals or a mixture of metals with another element
alloy
Bronzeis an alloy of
copper and tin
Steel is an alloy of
iron and carbon
Brass is an alloy of
copper and zinc
Elements are arrranged in the periodic table n order of
atomic number
Elements with similar propereties are in the same
column
Elements in a column are part of a
group
The arrangement of the electrons givce the element their
chemical properties
All elements on the left side are metals except hydrogen while all elements on the far right are
nonmetals
A change of ______ seperate smetals and nonmetals
color
Have properties of metals and nonmetals.
Metalloids
Each element abrevvation is cahlled a
chemical symbol
The are places for new elemnets to be added but most new metals are
artifical
A substance made of atomso f two or more elements
Compound
In ______ most elements are joined together in compounds
nature
Shows which elemnets and how many atoms are in a compound
Chemiacal Formula
The number next to the compound is there because
to shows that how many atoms of that element are in that molecule
H2O means there are ___ hydrogen and ___ oxegyn
2,1
NaCi
Na mean 1 sodium and Ci chloride= Salt