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Which one of the following element is represented as Eka-Silicon in Mendeleev's periodic table?
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Important Questions on Classification of Elements and Periodicity in Properties
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The correct match among the following is
(a) Lithium, Sodium, Potassium (i) Alkaline earth metals
(b) Beryllium, Magnesium, Calcium (ii) Semi-metals
(c) Oxygen, Sulphur, Selenium (iii) Alkali metaIs
(d) Silicon, Germanium, Arsenic (iv) Chalcogens
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The name of an element is Unbinilium. Its atomic number is
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The effective nuclear charge of an element with three valence electrons is . What is the atomic number of the element?
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Which element has the highest first ionization potential?
MEDIUM
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The electronegativities of and are in the order -
