Question

Define symbol..

Define valency..​

Answer 1

a mark or character used as a conventional representation of an object, function, or process, e.g. the letter or letters standing for a chemical element or a character in musical notation.

the combining power of an element, especially as measured by the number of hydrogen atoms it can displace or combine with...

Answer 2

Answer:

Symbol - a sign , object etc which represent something .

Valency - a measurement of the power of an atom to combine with others , by the number of hydrogen atoms it can combine with or take the place of

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