Atomic radii decreases, bond dissociation enthalpy becomes more negative along period.
Atomic radii increases, bond dissociation enthalpy becomes less negative down the group.
Anomalous property of N, O and F is due to small size, high electro negativity, high ionization enthalpy and unavailability of d orbital.
Industrial manufacture of dinitrogen is done by liquefaction and fractional distillation of air, ammonia by Haber process and nitric acid by Ostwalds process.
Oxides of nitrogen have oxidation states from +1 to +5.
Industrial manufacture of oxygen is done by electrolysis of water, fractional distillation of air.
In general, metallic oxides are basic and non-metallic oxides are acidic.
Amphoteric oxide exhibit characteristics of both acidic and basic oxides.
Neutral oxides react neither with acid nor with bases. Ozone is a stronger oxidizing agent than oxygen.
Phosphorous has red, white and black as its allotropic forms.
Phosphine due to its proton donating ability acts as a Lewis base.
Basic character of oxoacids is due to the H atoms which are attached with oxygen in P–OH form and are ionisable.
Reducing character of oxoacids is due to the presence of phosphorous-hydrogen bonds.
Large scale manufacture of chlorine is done by Deacon’s process and electrolytic process.
Chlorine reacts with metals and non-metals forming corresponding chlorides.
As the oxidation state of halogen in oxoacid increases the acid character of oxoacid increases.
The compounds containing two or more halogen atoms are called inter halogen compounds.
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