Question

why atomic number is considered very important to know about the chemical behaviour of an element​

Answer 1

Answer:

for chemical reaction atomic number is very important

Answer 2

If you know the atomic number of an element, then you are able to locate its place in the Periodic Table. This gives you much relative information about the physical characteristics of that element. You also know the number of electrons which allows you to work out the orbital structure which gives you a great deal of information about its chemical properties. So a single number is quite valuable in characterizing an element.

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