Q73 of 400 Page 171

The electronic configurations of two elements A and B are given below:

A 2, 6


B 2, 8, 1


(a) What type of chemical bond is formed between the two atoms of A?


(b) What type of chemical bond will be formed between the atoms of A and B?

(a) The type of chemical bond which is formed between the two atoms of A is covalent bond.

(b) The type of chemical bond which will be formed between the atoms of A and B is ionic bond.



More from this chapter

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70 An element A has 4 valence electrons in its atom whereas element B has only one valence electron in its atom. The compound formed by A and B does not conduct electricity. What is the nature of chemical bond in the compound formed ? Give its electron-dot structure. 71 In the formation of a compound XY2 atom X gives one electron to each Y atom. What is the nature of bond in XY2 ? Give two properties of XY2 74 Four elements A, B, C and D have the following electron arrangements in their atoms:

A 2, 8, 6


B 2, 8, 8


C 2, 8, 8, 1


D 2, 7


(a) What type of bond is formed when element C combines with element D?


(b) Which element is an inert gas?


(c) What will be the formula of the compound between A and C?

 75 An element X of atomic number 12 combines with an element Y of atomic number 17 to form a compound XY2. State the nature of chemical bond in XY2 and show how the electron configurations of X and Y change in the formation of this compound.