Dobereiner made the first observation of . . . . . . . . as a catalyst.
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Chemistry GK · all questionsPeriodic Classification of elements
Periodic Classification of elements
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What is the relative tendency of an atom to attract electrons towards another element when it is bound to the atom?
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The atomic numbers of the four elements are as follows:
F(9), P(15), Cl(17), Ar (18).
Which of the following two elements will be chemically similar?
F(9), P(15), Cl(17), Ar (18).
Which of the following two elements will be chemically similar?
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An element of atomic number 16 is present in the periodic table . . . . . . . . period?
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The atomic number of N is 7, then the atomic number of the third element of the nitrogen group is:
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Very metallic element in the fifth period . . . . . . . . is?
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In Periodic Table, metallic elements appear
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Non-metallic properties increase-
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The Modern Periodic Table is based on . . . . . . . . of the elements.
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All the elements in the same group of the periodic table have same . . . . . . . .?
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An element with electronic configuration 2, 8, 8, belongs to . . . . . . . . group in the modern periodic table
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Which of the following elements is more electronegative?
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The electronic configuration of an element is 2, 8, 3. this . . . . . . . . Belongs to the group.
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The group that shows the correct order of the first ionisation potential is:
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Which of the following is the third member of the Dobereiner's triad, which also includes lithium and sodium?
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Which group of modern periodic table contains complete valence shells and chemically inert elements?
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In the modern periodic table, elements with atomic numbers 58 to 71 are called-
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Which of the following elements has maximum atomic radius?
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Which one of the following is not a periodic property i.e., does not show any trend on moving from one side to the other in the Periodic Table?
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What are the horizontal rows in a periodic table called?
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