Which halogen is most reactive

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CBSE has released the term-1 admit card Share This Video. Apne doubts clear karein ab Whatsapp par bhi. Try it now. Fluorine is the most reactive Halogen. Not just in the halogen family, but in the whole periodic table it is the most reactive non-metal.

It belongs to second period and group 17 of the periodic table. The size of the Fluorine atom is smallest in its period and group. Since it has just two shells , the nuclear hold is quite strong, thus the tendency to gain an electron is very high.

Also, it's easier for Fluorine atom to gain one electron rather than loosing seven electrons to get a stable configuration. All these factors are responsible for making Fluorine the most reactive non-metal. Also, as me move down in a group reactivity decreases in case of non-metals and increases in case of metals.

Get Started for Free Download App. More Chemistry Questions Q1. Which of the following pair is correct? Isotopes - different mass number II.

This is because fluorine atoms are the smallest of the halogens—the atoms are bonded close together, which leads to repulsion between free electrons in the two fluorine atoms. The boiling points of halogens increase down the group due to the increasing strength of Van der Waals forces as the size and relative atomic mass of the atoms increase. This change manifests itself in a change in the phase of the elements from gas F 2 , Cl 2 to liquid Br 2 , to solid I 2.

The halogens are the only periodic table group containing elements in all three familiar states of matter solid, liquid, and gas at standard temperature and pressure. Electronegativity is the ability of an atom to attract electrons or electron density towards itself within a covalent bond. Electronegativity depends upon the attraction between the nucleus and bonding electrons in the outer shell.

This, in turn, depends on the balance between the number of protons in the nucleus, the distance between the nucleus and bonding electrons, and the shielding effect of inner electrons.

In hydrogen halides HX, where X is the halogen , the H-X bond gets longer as the halogen atoms get larger. This means the shared electrons are further from the halogen nucleus, which increases the shielding of inner electrons. This means electronegativity decreases down the group. Halogens are highly reactive, and they can be harmful or lethal to biological organisms in sufficient quantities. This reactivity is due to high electronegativity and high effective nuclear charge.

Halogens can gain an electron by reacting with atoms of other elements. Fluorine is one of the most reactive elements. It reacts with otherwise inert materials such as glass, and it forms compounds with the heavier noble gases.