Periodic Classification of Elements MCQ Neet

Which of the following elements are known as Lanthanoides 1. Elements from atomic number 51 (Lanthanum) to 70 (Herbium) 2. Elements from atomic number 89 (Actinium) to 102 (Nobelium) 3. Elements from atomic number 11 (Sodium) to 18 (Argon) 4. Elements from atomic number 37 (Rubedium to 54 (Xenon)

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Seventh Period is … 1. Small period 2. Long period 3. Incomplete 4. None

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Sixth period has 1. 18 elements 2.8 elements 3.32 elements 4. In complete

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Fourth and Fifth periods consist of …. elements each 1.2 2.8 3.18 4. 28

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Each period in the periodic table ends with an 1. Halogen 2. Chalkogen 3. Inert gas element 4. None of these

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All the inert gases are placed in 1. Zero group 2. First group 3. Second group 4. Third group

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Based on the electronic configuration, the elements are classified into….. classes 1. Two 2. Three 3. Four 4. Five

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Elements from atomic number 89 (Actinium) to 102 (Nobelium) are known as 1. Lanthanoids 2. Actinoids 3. Inertgases 4. Representative elements

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According to Newlands concept of actaves if elements are arranged sequentially in the increasing order of their atomic weights 1. Every sixth element is having similar properties 2. Every eighth element is having similar properties 3. Every eighteenth element is having similar properties 4. Every fourth element is having similar properties

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Concept of actaves was proposed by 1. Mosley 2. Mendeleef 3. Newlands 4. Pettenkofer

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