| 1. | Modern Periodic law is based upon ? | |
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Atomic number
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Atomic mass
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Number of electron
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Number of neutrons
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Report Question| 2. | Which one of the following elements exhibit the maximum number of valence electrons ? | |
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Al
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Si
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P
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Na
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| 3. | The modern periodic table is given by ________ ? | |
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Mosley
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Bohr
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Einstein
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Mendeleev
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| 4. | The least reactive element in group 17 is ___________ ? | |
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bromine
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chlorine
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iodine
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fluorine
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| 5. | The number of electrons in the valence shell is equal to its ________ ? | |
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atomic volume
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period number
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group number
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atomic mass
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| 6. | Which of the following is non-metal and to which group does it belong ? | |
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Cadmium
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Bromine
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Gallium
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Lead
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| 7. | Which of the following set of elements is written in order of their increasing metallic character ? | |
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Mg Al Si
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Be Mg Ca
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C Q N
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Na Li K
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| 8. | What is the atomic number of element of period 3 and group 17 of the Periodic Table ? | |
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21
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4
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10
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17
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| 9. | Upto which element, the Law of Octaves was found applicable ? | |
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Potassium
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Cobalt
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Calcium
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Oxygen
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| 10. | Which of the following is most reactive ? | |
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Na
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K
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H
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Li
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