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Periodic Classification of Elements - 1

Periodic Classification of Elements - 1

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Questions

Question 1 Multiple Choice (Single Answer)

An atom has electronic configuration 2, 8. To which of the following elements would it be chemically similar?

  1. Ar
  2. C
  3. Cl
  4. F
Question 2 Multiple Choice (Single Answer)

Which of the following statements is true about the Mendeleev’s periodic table?

  1. In Mendeleev’s periodic table, atomic masses of the elements increase in a regular manner.
  2. It was possible to predict the number of elements that could be discovered between two elements.
  3. Existence of hydrogen as a diatomic molecule was explained by the Mendeleev’s periodic table.
  4. Mendeleev used a Sanskrit numeral to name the undiscovered elements.
Question 3 Multiple Choice (Single Answer)

Which of the following elements is placed along with cobalt in the same slot in Mendeleev's periodic table?

  1. Silver
  2. Nickel
  3. Mercury
  4. Lead
Question 4 Multiple Choice (Single Answer)

Which of the following elements has the electronic configuration 2, 8, 8, 1?

  1. Sodium
  2. Potassium
  3. Scandium
  4. Calcium
Question 5 Multiple Choice (Single Answer)

In case of the triad containing the elements Ba, Ca and Sr, which of the following statements is correct?

  1. The atomic mass of Ba is roughly the average of the atomic masses of the other two elements.
  2. The atomic mass of Sr is roughly the average of the atomic masses of the other two elements.
  3. The atomic mass of Ba is less than the average of the atomic masses of the other two elements.
  4. The atomic mass of Sr is more than the average of the atomic masses of the other two elements.
Question 6 Multiple Choice (Single Answer)

Elements with which of the following electronic configurations will show periodicity in their properties?

  1. 2, 5 and 2, 8, 1
  2. 2, 7 and 2, 8, 18, 7
  3. 2, 4 and 2, 8, 5
  4. 2, 8, 4 and 2, 8, 5
Question 7 Multiple Choice (Single Answer)

Which of the following elements has the least number of shells in its atom?

  1. Na
  2. Ca
  3. Ga
  4. Ba
Question 8 Multiple Choice (Single Answer)

Where is the element with electronic configuration 2, 8, 7 placed in the modern periodic table?

  1. In group – 5
  2. In group – 7
  3. In group – 15
  4. In group – 17
Question 9 Multiple Choice (Single Answer)

Which of the following is the correct electronic representation of aluminium?

  1. 1s2 2s2 2p2 3s2 3p1
  2. 1s2 2s2 3p6 3s2 2p1
  3. 1s2 2s2 2p6 3p2 3s1
  4. 1s2 2s2 2p3 3s2 3p4
Question 10 Multiple Choice (Single Answer)

Which of the following is correctly matched?

  1. |||
    |---|---|
    | Group | Trivial name |
    | 1 | Alkaline earth metals |
  2. |||
    |---|---|
    | Group | Trivial names |
    | 2 | Alkali metals |
  3. |||
    |---|---|
    | Group | Trivial name |
    | 17 | Halogens |
  4. |||
    |---|---|
    | Group | Trivial name |
    | 18 | Transition metals |
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