Chemistry
Grade-9
Easy

Question

The atomic number of this Na is

  1. 23
  2. 11
  3. 22
  4. 16

Hint:

Atomic number of Na is 11.

The correct answer is: 11


    • Mendeleev periodic table has 118 elements arranged in 18 groups and 7 periods.
    • Moving from left to right atomic number increases by 1.
    • Atomic number of sodium is 11.

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