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Periodic Classification

Exemplar Problems

MCQ 2

Which of the following is the outermost shell for elements of period 2?

1. K shell
2. L shell
3. M shell
4. N shell
   Answer: (b) L shell

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Which one of the following elements exhibit maximum number of valence electrons?

1. Na
2. Al
3. Si
4. P
   Answer: (d) P

Which of the following gives the correct increasing order of the atomic radii of O, F and N?

1. O, F, N
2. N, F, O
3. O, N, F
4. F, O, N
   Answer: (d) F, O, N

Which among the following elements has the largest atomic radii?

1. Na
2. Mg
3. K
4. Ca
   Answer: (c) K

Which of the following elements would lose an electron easily?

1. Mg
2. Na
3. K
4. Ca
   Answer: (c) K

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Which of the following elements does not lose an electron easily?

1. Na
2. F
3. Mg
4. Al
   Answer: (b) F

Which of the following are the characteristics of isotopes of an element?

1. Isotopes of an element have same atomic masses
2. Isotopes of an element have same atomic number
3. Isotopes of an element show same physical properties
4. Isotopes of an element show same chemical properties

1. (i), (iii) and (iv)
2. (ii), (iii) and (iv)
3. (ii) and (iii)
4. (ii) and (iv)
   Answer: (b) (ii), (iii) and (iv)

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Arrange the following elements in the order of their decreasing metallic character: Na, Si, Cl, Mg, Al

1. Cl > Si > Al > Mg > Na
2. Na > Mg > Al > Si > Cl
3. Na > Al > Mg > Cl > Si
4. Al > Na > Si > Ca > Mg
   Answer: (b) Na > Mg > Al > Si > Cl

Arrange the following elements in the order of their increasing nonmetallic character: Li, O, C, Be, F

1. F < O < C < Be < Li
2. Li < Be < C < O < F
3. F < O < C < Be < Li
4. F < O < Be < C < Li
   Answer: (c) F < O < C < Be < Li

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