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The rows of the table are called periods; the columns are called groups. Six groups (columns) have names as well as numbers: for example, group 17 elements are the halogens; and group 18, the noble gases. The periodic table can be used to derive relationships between the properties of the elements, and predict the properties of new elements yet to be discovered or synthesized.
Chemical Characteristics. Nitrogen is inert in nature and does not react easily with other elements and compounds. Nitrogen forms five oxides of with oxygen, with oxidation number of nitrogen ranging from one to five.Important acid of nitrogen are nitric acid and nitrous acid.ppearance. The appearances of the members of the nitrogen group are not similar. Nitrogen being a gas, is colorless and odorless. Phosphorus is found in natural form in white, red and black solid structure.