Practice test

Periodic table - Test Set 6

Review 20 exam-focused questions with detailed explanations, then start the interactive test when you are ready.

20 questions

Questions and explanations

  1. Question 1

    _____________ Melting point is very low.
    1. K
    2. Ga
    3. Na
    4. Ba
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  2. Question 2

    Dobereiner made the first observation of__________ as a catalyst.
    1. Au
    2. Ni
    3. Pt
    4. Ag
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  3. Question 3

    Who invented the periodic table?
    1. Dmitry Mendeleev
    2. Louis Pasteur
    3. Marie Curie
    4. Antoine Lavoisier
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  4. Question 4

    What is Mendeleev's recurrent law based on?
    1. Number of neutrons
    2. Atomic number
    3. Atomic mass
    4. Atomic radius
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  5. Question 5

    According to Mendeleev's Periodic Law, elements were arranged on the basis of __________ in the periodic table?
    1. increasing atomic number
    2. decreasing atomic number
    3. decreasing atomic masses
    4. increasing atomic masses
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  6. Question 6

    How many elements were known when Mendeleev began his work?
    1. 65
    2. 64
    3. 66
    4. 63
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  7. Question 7

    In the Mendeleev periodic table, gaps were left for undiscovered elements. Which of the following elements later found a place in the periodic table?
    1. Ge
    2. F
    3. Ca
    4. Mg
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  8. Question 8

    In Mendeleev's periodic table, the horizontal rows are called ________?
    1. unit
    2. period
    3. group
    4. groups
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  9. Question 9

    Who is credited with classifying elements on the basis of their atomic mass?
    1. Dmitry Mendeleev
    2. John Dalton
    3. John Alexander Reina Newlands
    4. Johann Wolfgang Dobereiner
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  10. Question 10

    In Mendeleev's periodic table, the periodic nature of properties of the elements considered on the basis of__________.
    1. Atomic number
    2. Atomic mass
    3. Atomic size
    4. Ionization enthalpy
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  11. Question 11

    Who is credited with classifying elements on the basis of their atomic mass?
    1. Dmitry Mendeleev
    2. John Dalton
    3. John Alexander Reina Newlands
    4. Johann Wolfgang Dobereiner
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  12. Question 12

    What did Dmitry Mendeleev prepare?
    1. Anarchy theory
    2. Periodic table of chemical elements
    3. Alpha effect
    4. Golden intermediate point
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  13. Question 13

    Which of the following classifications is based on atomic numbers?
    1. Modern Periodic Table
    2. Mendeleev's Periodic Table
    3. Dabereiner's law of trides
    4. Newlands law of octaves
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  14. Question 14

    The modern periodic table was discovered by
    1. Bohr
    2. Mendeleev
    3. Einstein
    4. Mosley
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  15. Question 15

    Which element has atomic number 3?
    1. Boran
    2. Lithium
    3. Beryllium
    4. Sodium
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  16. Question 16

    Which of the following is not correct with reference to Neil Bohr's modern periodic table?
    1. The last element of every period has 8 valence electrons except helium, which consists of 2
    2. Elements of groups 3 to 12 are called transition elements.
    3. Elements that have atomic numbers from 57 to 70 are called lanthanide series.
    4. The element whose atomic number is 89 to 103 is called actinide series.
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  17. Question 17

    In the fourth period of the periodic table____ Elements are present?
    1. 18
    2. 28
    3. 38
    4. 8
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  18. Question 18

    The sixth period of the modern periodic table contains the ______ element?
    1. 18
    2. 8
    3. 32
    4. 33
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  19. Question 19

    In the modern periodic table, which period has 32 elements?
    1. Period 4
    2. Period 3
    3. Period 5
    4. Period 6
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  20. Question 20

    What are the horizontal rows in a periodic table called?
    1. Period
    2. Pattern
    3. Valency
    4. Group
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