Actually, these rules don't have so much to do with the same column as the same metal/nonmetal grouping on the periodic table.
If they are both nonmetals, then you use numeric prefixes on each element or chemical group that is involved, because the number of oxidation states often varies, and the name needs to explicitly state what the chemical bonding is:
- PO4 - phosphorus tetroxide
- P2O5 - diphosphorus pentoxide
If you have a metal and a nonmetal, then you just specify the metal (if it is a transition metal, with multiple oxidation states, then specify the oxidation number) and the nonmetal with "-ide" suffix:
- NaCl - sodium chloride
- Cu(OH)2 - copper (II) hydroxide
182 I don't think there are compounds in the periodic table. As far as I know the periodic table contains only elements, compounds are formed by ionic/covalent bonding which is another story already. http://www.webelements.com/
groups or family:))
hydrogen
All elements within a column are called a group.
A vertical column is called a 'group.' A horizontal row is called a 'period,' thus the periodic table.
First off, there is no "salt" on the periodic table of the elements. Salt is a compound. However, you may be talking about "sodium". If that's the case, sodium is NOT in the same column as oxygen in the periodic table. Sodium is in the first column while oxygen is in the sixteenth column.
A group is a column in the periodic table of elements.
a family is a column of elements a period is a row of elements
Representative elements
The Periodic Table is a table of elements but water is a compound.
The elements in a column on the periodic table form a group (or family) because they have similar physical and chemical properties.
A column of elements in the periodic table is called a group or
groups
182 I don't think there are compounds in the periodic table. As far as I know the periodic table contains only elements, compounds are formed by ionic/covalent bonding which is another story already. http://www.webelements.com/
Water isn't on the periodic table as it is a compound and only elements are on the periodic table
Periodic table is an array or elements not compounds. Sucrose is a compound and not an element and hence it is not there or the periodic table.
A group of elements.