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0. An element X has 7 electrons in its L shell. What is true about the element X___________________ ? I. It belongs to period 9 of modern periodic table. II. Its atom contains 9 protons. III. It has a valency of 7. IV. Its atoms can accept an electron to acquire noble gas configuration (NTSE Stage-II, 2012-13)
(I) & (II)
(II) & (III)
(III) & (IV)
(II) & (IV)
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