Question

Which number is unique for every element in a periodic table? Explain

Answer 1

Answer:

This is the total number of protons and neutrons in an atom. The number below the symbol is the atomic number and this reflects the number of protons in the nucleus of each element's atom. Every element has a unique atomic number. Lead has 82 protons therefore its atomic number is 82.

Answer 2

Answer:

Atomic Number

Explanation:

Atomic Number is the no.of protons and neutrons present in that atom and represents the position of that element in the periodic table,Since there is only 1 element per 1 position,therefore Atomic Number  is unique for every element in a periodic table

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