Which element has the same number of valence electrons as chlorine (Cl)?

7 N - Nitrogen. From the above electron configuration of chlorine,we see that chlorine has 7 valence electrons in its valence shell.

Explanation:

Valence electrons are the number of electrons present in the outermost shell of an atom. The last shell of a chlorine atom has 7 electrons in it. Therefore, there are 7 valence electrons in an chlorine atom.

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c. because step up transformer steps up the input voltage i.e increases the input voltage  

the number of turns are greater on the secondary side of step up transformer  

transformer does not handle dc current