Define valency what conclusion can be drawn about the reactivity of an atom from its valency
Answers
An atom will always try to acquire an octet or acquire a state of stability by giving,taking or sharing electrons.The valency of an atom determines its combining capacity or the no. of electron it will gain,lose or share to become stable. Valency is the number of electrons in outermost shell of an atom.
Hope it helps you....
please mark as a brainliest answer..
The electrons which are present in electrons in the outermost electron shell of an atom is called valency.
The most reactive kind of metallic element is a metal from Group 1 (e.g., sodium or potassium).
An atom in Group 1 has only a single valence electron. This one valence electron is easily lost to form a positive ion with an s2p6 configuration (e.g., Na+ or K+).
A metal from Group 2 (e.g., magnesium) is somewhat less reactive, because each atom must lose two valence electrons to form a positive ion (e.g., Mg2+ with an s^2p^6configuration.
Within each group of metals, reactivity increases as you go down the group.
The valence electrons are less tightly bound and easier to remove, because they are farther away from the nucleus of the atom.