Chemistry
Grade-9
Easy

Question

Which sort of substances are included in the Periodic Table?

  1. Elements
  2. Electrons
  3. Neutrons
  4. Compounds

hintHint:

There are 118 elements in periodic table.

The correct answer is: Elements


    • In Mendeleev's periodic table there are 118 elements arranged in 18 groups and 7 periods.
    • Mass number = number of protons + atomic number.
    • Neutrons are subatomic particle.
    • Compounds are composition of two or more elements.

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