Solution - Position of Elements and Trends in the Modern Periodic Table



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The formulae of chloride of metal M is MCl2. The metal M belongs to ……………. group.


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Calcium is an element with atomic number 20. Stating reason, answer each of the following questions:-

(i) Is calcium a metal or a non-metal?

(ii) Will its atomic radius be larger or smaller than that of potassium with atomic number 19?

(iii) Write the formula of its oxide.

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Which element has twice as many electrons in its second shell as in its first shell?

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Write the number of vertical columns in the modern periodic table. What are these columns called?

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Two elements ‘P’ and ‘Q’ belong to the same period of the modern periodic table and are in Group 1 and Group 2, respectively. Compare their following characteristics in tabular form:-

(a) The number of electrons in their atoms

(b) The sizes of their atoms

(c) Their metallic character

(d) Their tendencies to lose electrons

(e) The formula of their oxides

(f) The formula of their chlorides

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List any two properties of the elements belonging to the first group of the modern periodic table.

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Solution for concept: Position of Elements and Trends in the Modern Periodic Table. For the courses 8th-10th CBSE, 9th - 10th SSC (English Medium)