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9th Standard English Medium Science Subject Atomic Structure Book Back 2 Mark Questions with Solution Part - I updated Book back Questions

9th Standard English Medium Science Subject Atomic Structure Book Back 2 Mark Questions with Solution Part - I

9th Standard

    Reg.No. :
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Science

Time : 00:30:00 Hrs
Total Marks : 10
    5 x 2 = 10

  1. Name an element which has the same number of electrons in its first and second shell

  2. Compare the charge and mass of protons and electrons.

  3. For an atom ‘X’, K, L and M shells are completely filled. How many electrons will be present in it?

  4. Arrange the following in the increasing order of atomic number
    Calcium, Silicon, Boron, Magnesium, Oxygen, Helium, Neon, Sulphur, Fluorine and Sodium

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