Q34 of 52 Page 43

If an element X is placed in group 14, what will be the formula and the nature of bonding of its chloride?

If an element X is placed in group 14, its chemical formula is XCl4.


The nature of bonding of its chloride is covalent bonding.


Element X has 4 valence electrons. Thus, it has valency 4. This element must show covalent bonding in order to complete octet configuration. So the chemical formula would be XCl4.


Since this compound is form by sharing of electrons, the bond is covalent in nature.


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32

Write the formulae of chlorides of Eka-silicon and Eka-aluminium, the elements predicted by Mendeleev.

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Three elements A, B and C have 3, 4 and 2 electrons respectively in their outermost shell. Give the group number to which they belong in the Modern Periodic Table. Also, give their valencies.

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Compare the radii of two species X and Y. Give reasons for your answer.

(a) X has 12 protons and 12 electrons


(b) Y has 12 protons and 10 electrons

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Arrange the following elements in increasing order of their atomic radii.

(a) Li, Be, F, N


(b) Cl, At, Br, I