Question

--------------------------------------------------------------------------------How to find the valency of any compound like OH,CO2 in detail --------------------------------------
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Answer 1

Hey mate,...

Use the below steps :-

↪Write the symbols side by side, basic radical is written first and then acidic radical.

↪Write the valency of each atom on top of its symbol.

Hope it will help you.

⭐Sai.

↪Divide the valency numbers by their highest factor, if any, to get the simple ratio. Ignore the (+) or (-) symbols of the radicals. Interchange the valencies of the radicals.

↪Write the interchanged valency numbers to the lower right of the radicals. If the radical is a group of atoms and has a valency number more than 1, enclose it within brackets.

Answer 2

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To find the valency of an element, it is absolute that we must know the atomic number of that element.

For example, for the element Carbon ⚛️
the atomic number is 6
Convert into electronic configuration:. 2, 4

Consider the final shell alone.
Here 4️⃣ so Subtract 4 from 8️⃣
the answer is 4.

Thus, the Valency is 4

For elements with valence electrons 4 and <4 the Valency is the valence number itself. For example Lithium ⚛️ the valence shell is 1. So Valency is 1️⃣

For elements with valence electrons >4, subtract it from number 8. For example Fluorine ⚛️ the Valency is 2,7 and the valence shell numner is 7. Subtracting from 8 we get 1. so Valency is 1️⃣.

For elements in the Oxygen group, it is not the same. For example Oxygen has 2,6 . But the valence can be 6 or 2 according to the situation.

☺Hope you understood☺