10th Class Science Metals and Non-metals Question Bank 10th CBSE Science Metals and Non-metals

  • question_answer    (i) How do you classify elements into metals and non-metals on the basis of their electronic configuration? Choose metal and non-metal out of the following: (ii) What type of bond will be formed if (a) 'A' combines with 'B'?   (b) 'A' combines with 'E'? (c) 'C' combines with 'E'? (d) 'D' combines with 'E'?  

    Answer:

                      (i) Elements which contain 1 to 3 electrons in their outermost shell are metals. Elements containing 4 to 7 electrons in their valence shell are non-metals. Electronic configurations:           Hence A and C are metals whereas, B, D and E are non-metals. (ii) Type of bonds (a)'A' is metal and 'B' is non-metal, so the bond formed will be ionic. A = 2, 8, 1,            B = 2, 7 (b) 'A' is metal and 'E' is non-metal, so the bond formed is ionic. A =2, 8, 1           E=2, 8, 7 (c) 'C' is metal and 'E' is non-metal, so the bond formed is ionic. (d) 'D' is a non-metal and E is also a non-metal, so the bond formed will be covalent. D=2, 8, 5                                               E=2, 8, 7    


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