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Answer:
Symbols: Each capitol letter means that there is a new element
Li2
Cl3
is made of lithium and chlorine
Na2
SO4 is made of sodium, sulfur and oxygen
Chemical Formulas are used to describe a chemical compound, when two or more atoms
combine to form a new substance.
A combination of chemical symbols shows the elements that make up a chemical compound.
The chemical formula for water is H2O
H stands for HYDROGEN.
O stands for OXYGEN.
Subscripts are numbers that come after a symbol and below. Subscripts tell you the number of
atoms of that element. If an element does not have a subscript, then it is understood that the
subscript is 1.
Li2Cl3 has two lithium atoms and three chlorine atoms
Na2SO4 has two atoms of sodium, one atom of sulfur, and four atoms of oxygen
A subscript outside a parenthesis affects all the elements inside the parenthesis. Multiply the
subscript on the outside by the subscript of the atoms on the inside.
Al (SO4)3 has 1 atom of aluminum, 3 atoms of sulfur, and 12 atoms of oxygen.
Coefficients are full size numbers in front of chemical formula. The coefficient multiplies everything
in the formula. It also represents the number of molecules of that compound.
2Na2
SO4 has 4 sodium atoms, 2 sulphur atoms, and 8 oxygen atoms.
2Al (SO4)
3 has 2 aluminum atoms, 6 sulfur atoms, and 24 oxygen atoms
When you count atoms, remember to multiply the coefficient number and the subscript number to find
the number of atoms of that element.
Explanation:
