1.3a Chemical Formulae
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14 Terms
What indicates the valency of an element in the name of a compound?
Roman numerals
What are ions containing more than one type of atom called?
Group ions
How must charges and numbers of atoms or ions be written in chemical formulae?
Charges must be superscript and numbers of atoms or ions must be subscript
What can be calculated from the formula of any compound?
The percentage composition of an element
What is the formula used to calculate percentage composition by mass?
Percentage by mass equals mass divided by gram formula mass multiplied by one hundred
On what page of the data book can the percentage composition formula be found?
Page three
What is an ore?
A naturally occurring solid material from which a metal or valuable mineral can be extracted
What is the gram formula mass?
The sum of the relative atomic masses of all the atoms present in the formula
What is the roman numeral for one?
I
What is the roman numeral for two?
II
What is the Roman numeral for three?
III
What is the roman numeral for four?
IV
What is the roman numeral for five?
V
What is the roman numeral for six?
VI