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Which of the following element was present in Mendeleev's periodic table?
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Important Questions on Classification of Elements and Periodicity in Properties
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The neutral oxide among the following is
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Mendeleev's periodic law states that the properties of elements are a periodic function of their
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Which of the following is a metalloid?
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Henry Moseley studied characteristic -ray spectra of elements. The graph which represents his observation correctly is
Given Frequency of X-ray emitted
Atomic number
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Which of the given atoms has the greatest electron affinity?
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Identify the incorrect match.
| Name IUPAC | Official Name |
| (a) Unnilunium | (i) Mendelevium |
| (b) Unniltrium | (ii) Lawrencium |
| (c) Unnilhexium | (iii) Seaborgium |
| (d) Unununium | (iv) Darmstadtium |
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Which one of the following element is represented as Eka-Silicon in Mendeleev's periodic table?
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It is observed that characteristic X-ray spectra of elements show regularity. When frequency to the power 'n' i.e. of X-rays emitted is plotted against atomic number , the following graph is obtained.
The value of 'n' is
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In which of the following options, the law of triad is applicable?
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Which one of the following statements for D.I. Mendeleev, is incorrect ?
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The atomic number of the element unnilennium is :
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Mendeleev corrected the atomic weight of
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Mendeleev's Periodic Table is upset by the fact that
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How many elements were known when Mendeleev presented the periodic table ?
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-aluminium and -silicon are known as -
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In Lother Meyer plot, the peaks are occupied by
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Anomalous pair in Mendeleev's table is
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Which of the following element have maximum atomic volume?
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The atomic weights of "Be" and "In" were corrected by Mendeleev using the formula
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Eka silicon is now called as
