Science

9th

grade

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Atoms and molecules

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10 questions

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  • 1. Multiple Choice
    15 minutes
    1 pt

    What is the chemical formula of sodium carbonate?

    Na2CO3

    NaHCO3

    NaCO3

    Na2HCO3

  • 2. Multiple Choice
    15 minutes
    1 pt

    Which of the following is the correct pair of atom and it's atomic symbol?

    Sulphur-Su

    Potassium-P

    Phosphorus-P

    Sodium-S

  • 3. Multiple Choice
    1 minute
    1 pt

    Number of moles present in 28 gm of Nitrogen atoms are

    1

    2

    3

    4

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