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its high electro negativity
small size of fluorine atom
availability of d-orbitals
strong F - F bond
The hottest part of the gas flame is known as
The human body is made up of several chemical elements; the element present in the highest proportion (65%) in the body is
The hydronium ion is
The inert gas used as beacon light is
The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing is
The inert gases are _ in water.
The inexpensive and commonly used variety of glass is called soda glass. It is called so because
The ionic radii of N3-, O2-, F- and Na+ follows the order
The ionisation energy of hydrogen atom in the ground state is x KJ. The energy required for an electron to jump from 2nd orbit to 3rd orbit is
The iron ore magnetite consists of