The vertical lines in the modern periodic table are called—
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The elements in group zero are called—
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The vertical rows in a periodic table are called
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Which element has the atomic number 8?
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How many groups are present in the modern periodic table?
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Which one is known as the father of periodic table?
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Element which perfectly matched qualities which Mendeleev predicted in his Periodic table was
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For yet undiscovered elements Periodic table has
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Values of group IIA, VA and VII in every period is
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Russian chemist Dmitri Mendeleev in 1869 devised
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Terbium (Tb) atomic mass of 159 belongs to block
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In group from top to bottom electron affinity
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