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The valency of halogens is 1. his refers to the ability of an element to takeup or give out an electron to form a complete shell of energy.

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Which Group of the Periodic Table can all have a valency of -1?

Halogens have a valency of -1.


How are halogens like metals?

Halogens are not like metals. Halogens are elements missing one electron for full valency.


How do the physical and chemical properties of the halogens comparew with those of the inert gases?

Halogens are very reactive both physically & chemically than that of inert gases ,as halogens have valency 1.


what element has 7 valency electrons?

Halogens have 7 valence electrons. They can be found on the second column from your right on the periodic table


What is the valency for iodine?

Iodine typically carries a valency of -1, +1, +3, +5, or +7, depending on the compound it is a part of.


Why do elements in th alkali metals group often form iconic bonds with the halogen group?

Alkali metals have one electron in their valency shell whereas halogens have seven. By losing al electron to a halogen, both ions get a full set of electrons in their valency shell.


How many valence electrons do Halogens have?

The number of electrons are different from one to another, however all of them have seven electrons in the valence shell.


What is mean by valency?

Variable valencies are the valencies which can change e.g. Fe (iron) can either have the valency of 2 (Fe II) or 3 (Fe III)


Why group VIIA elements are called haolgens?

halogens mean salt-former halogens form inorganic salts easily


What do you mean by variable valency?

Variable valencies are the valencies which can change e.g. Fe (iron) can either have the valency of 2 (Fe II) or 3 (Fe III)


What is the valency of lithium?

The valency of lithium is 1. It has one valence electron in its outer shell.


What is valency of argon?

Its valency is 0.