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ch. 6.1
study guid for test
18
Science
8th Grade
12/01/2010

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Term
chemical formula
Definition
uses these chemical symbols to represent the atoms of the elements and their ratios in a chemical compund
Term
subscript
Definition
is a number written to the right of a chemical symbol and slightly below it
Term
why do compounds have different properties?
Definition
from the elements that make them
Term
what are most substances
Definition
compounds
Term
what is a compound
Definition
a compound is a substance made of atoms of two or more different elements
Term
what are chemical bonds
Definition
can hold atoms together in large networks or in small groups
Term
what do bonds help with
Definition
they help with determing the properties of a compound
Term
what do calcium + chlorine = ?
Definition
calcium chloride
Term
what do atoms combine in
Definition
they combine in predictable numbers
Term
what does a given compound always contain
Definition
it always contains atoms of elements in a specific ratio
Term
what can be represented by their chemical symbols, as given in the periodic table
Definition
atoms of elements
Term
carbon dioxide is a compound consisting of what
Definition
consisting of one atom of carbon attached by chemical bonds to two atoms of oxygen
Term
what could different compunds be composed of what  
Definition
of atoms of the same elements
Term
what does one compound consists
Definition
consists of one atom of nitrogen attached to one atom of oxygen
Term
what is hydrogen peroxide
Definition
is commonly used to kill bacteria on skin
Term
what will a drop of hydrogen peroxide on a raw potato do
Definition
it will make the potato bubble
Term
if one puts a drop of water on a raw potato will it foam?
Definition
no
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