Question

Write a short note on anomalous behavior of Oxygen.

Answer 1

Oxygen is a chemical element with the atomic number 8 and the symbol O. It is a highly reactive nonmetal and an oxidising agent that rapidly produces oxides with most elements and other compounds. It belongs to the chalcogen group in the periodic table. By mass, oxygen is the third most plentiful element in the universe, behind hydrogen and helium.

Complete answer:
Oxygen belongs to the chalcogen group on the periodic table. In the vast majority of combustion processes, it is a required component. It's one among the most widely distributed elements on the planet's surface.
Anomalous Periodic Properties: What Causes Them?
Differences in periodic characteristics, and hence chemical behaviour, can be explained as follows:
-These atoms are quite small.
-Electronegativity is high.
-The charge-to-radius ratio is very high.
These elements likewise have only 4 valence orbitals accessible for bonding (2s and 2p) compared to the 9 accessible to the other members of the relevant groups (3s, 3p, and 3d), resulting in a maximum covalency of 4.
-Oxygen's unusual behaviour
-Others are polyatomic, whereas oxygen is diatomic.
-Others are solid, whereas oxygen is a gas.
-Except in $O{F_2}$ , oxygen has negative oxidation states.
-Others are diamagnetic, whereas oxygen is paramagnetic.
The following are the reasons:
-Size is small.
-An increase in electronegativity
-D-orbitals aren't available.
At room temperature, oxygen is a gas, whereas others are solids. Oxygen is a non-metallic element. Sulphur is a non-metallic element, whereas others have a metallic flavour. Oxygen forms $p\pi - p\pi$ many bonds with atoms of comparable size due to its tiny size and high E.N. Others are diamagnetic, whereas oxygen is paramagnetic.

Note:
Many major classes of organic molecules in living organisms, such as proteins, nucleic acids, carbohydrates, and fats, contain oxygen atoms, as do the major constituent inorganic compounds of animal shells, teeth, and bone. Dioxygen provides the energy released in combustion and aerobic cellular respiration, and many major classes of organic molecules in living organisms, such as proteins, nucleic acids, carbohydrates, and fats, contain oxygen atoms. The majority of the mass of living beings is oxygen, which is a component of water, which is the primary component of all lifeforms.