13. Which one of these elements has the greatest metallic character A)Si B) Se C

Question

13. Which one of these elements has the greatest metallic character A)Si B) Se C) Ge D) P E) Mn 14. The combustion reaction of glycine, CH NO, is given by the following equation Given that AH. [CO?g)--393.5 klinol and Arr[H00--285.8 khol, calculate the enthalpy of formation of glycine. A) -2,149 kJ/mol B) -964.8 kJ/mol C) -537.3 kJ/mol D) -3,178 kJ/mol E) -268.2 kJ/mol Which response includes all the molecules below that do not follow the octet rule? [Assume all bonds are covalent bonds] 15. (G) HSe (ii) AICl, (ii) PHs (iv) SeCl A) ?? and ill B) i and iv C) ?and ii D) iii and iv E) ii and iv

Explanation / Answer

13.(E) option i.e Mn

Mn is more electropsitive than other p- block elements given in all other options and electroposite character is directly proportional to the metallic character.

Also left to right of periodic table metallic character increases from s block to d block and then decreases from d block to p blocks.

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