Chemistry
Grade-9
Easy

Question

Each element is unique based on its number of protons, also known as the

  1. Atomic mass
  2. Valence number
  3. Atomic symbol
  4. Atomic number

hintHint:

Each element has different atomic number.

The correct answer is: Atomic number


    • There are 118 elements in Mendeleev's periodic table.
    • Each elements is assigned a particular address as atomic number.
    • Each element is unique based on its number of protons, also known as the atomic number.

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