This is a timed quiz. You will be given 15 seconds per question. Are you ready?
15
Upto which element, the Law of Octaves was found applicable?
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Element ‘X’ forms a chloride with the formula XCl2, which is a solid with high melting point. X would most likely be in the same group of the periodic table as:
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At the time of Mendeleev, the number of elements known was?
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Where would you locate the element with electronic configuration 2, 8 in the Modern Periodic Table?
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In Mendeleev’s Periodic Table, gaps were left for the elements to be discovered later. Which of the following elements found a place in the Periodic Table later?
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An atom of an element has the electronic confi-guration 2,8,2. To which group does it belong?
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Wrong!
The arrangement of elements in the Modern Periodic Table is based on their?
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Wrong!
The properties of eka-aluminium predicted by Mendeleev are the same as the properties of later discovered element:
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Wrong!
Science Quiz 129
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