how to identify valency of A)element
B) compound
Rokesh:
I say how to find valency.
There are two methods should know
if no. of electrons in the outer shell greater than 4 , use this valency = 8-no. of electrons . eg oxygen , o , at. no. = 8, no. of electrons in the outer shell = 6, valency of oxygen = 8 - 6 = 2 .
if no. of electrons in the outer shell less than 4 or is 4 , use this valency = no. of electrons in the outer shell . eg : sodium, Na, at. no. =11, no. of electrons in the outer shell =1 , valency of sodium = no. of electrons in the outer shell = 1
tq
can u explain me abt the valency of Cu and Zn
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a) The first(and easiest) is simply to consult the periodic table. The elements are sorted into groups, and the elements in the groups(1–8 respectively) have the same valency as others in their group. For example, all of the elements in group 8 have eight electrons(high stability).The second method is to look at the total number of electrons, and then calculate the valency(if you don’t know, remember to look at the atomic number - the number of electrons is always equal to the number of protons). The valency of an atom is equal to the number of electrons in the outer shell if that number is four or less. Otherwise, the valency is equal to eight minus the number of electrons in the outer shell. Once you know the number of electrons, you can easily calculate the valency. All atoms other than hydrogen have two electrons in the first electron shell, and up to eight electrons in each succeeding electron shell. For example, the atomic number of chlorine is 17, making the configuration of electrons would be 2, 8, and 7 - meaning, the valency of chlorine is 7. Oxygen has eight electrons, two in the first shell and six in the outer shell, giving it a valency of 2.You can also calculate the valency of multi-element molecules the same way. For example, to determine the valency of, say, phosphorus tetraoxide, you would multiply the total valency of the four oxygen atoms (valency 2) and subtract that from the valency of the phosphorus atom (valency 5) to get the solution of 3.
b) If you know the atomic number. You can write the electronic configuration.
By the electronic configuration, we can know the valence electrons.
If valence electrons are
Less than 4 then valency is equal to the valence electrons.If valnce electrons are more than 4 then valency is equal to 8-valence electrons.If it is equal to 4 then valency is four only.
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b) If you know the atomic number. You can write the electronic configuration.
By the electronic configuration, we can know the valence electrons.
If valence electrons are
Less than 4 then valency is equal to the valence electrons.If valnce electrons are more than 4 then valency is equal to 8-valence electrons.If it is equal to 4 then valency is four only.
Hope this is helpful.
Thank you☺
Mark it brainliest plzz!
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valency of an element is identified by 8-the no of valence electron
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