Elements have
Compounds have two or more different
e.g. in CO2 for every atom of carbon there are
Water is a because water has more than type of (chemically combined).
Nitrogen is an element because there is only one type of .
N is the symbol for an element as there is one letter.
N2 s the symbol for an element as there is one letter.
CO2 is not the symbol for an element as there is more than one letter.
Co is the symbol for an element as there is only one letter.
These are elements that you need to be able to recognise as the name is based on the latin name so the letters are not intuitive.
Na =
K =
Pb =
Compounds made up of two elements will have a name ending in "ide"
The name starts with the metal and ends with the non-metal.
Name the following compounds
NaCl =
MgO =
AlBr3 =
FeS =
When oxygen is part of the compound the name tells us how many oxygens there are for each metal atom.
For one oxygen monoxide
For two oxygens dioxide
and for three oxygens trioxide.
Name the following compounds
CO = carbon
CO2 = carbon
SO2 = sulfur
SO3 = sulfur
Compounds that contain 3 or more elements including oxygen end in "ate"
Name the following
CaCO3 = calcium carbon
Na2SO4 = sodium sulf
Mg(NO3)2 = magnesium nitr
FeSO4 = iron sulf
A
A
A
An
An
An
A
A
Oxygen is an as there is only type of
Helium is an as there is only type of
Water (H2O) is a there are more than one type of chemically joined together in a fixed ratio.
Element | Compound | |
|---|---|---|
MgO | ||
Br₂ | ||
NaCl | ||
NaBr |
