You are given the reaction cu + hno3 cu(no3)2 + no + h2o. which element is oxidized? which element is reduced?

The element  which is oxidized   and  reduced in the equation below   is

Cu  + HNO3 = CU(NO3)2 + NO +H2O

 Cu  is  been oxidized  while   HNo3  is reduced

Cu is oxidized  because  it move from  oxidation  state zero to  oxidation state of  positive  two (2^+) .  HNO3  act  as  the oxidizing agent  therefore   it oxidizes   Cu  while itself  is  reduced  by Cu

All the elements are arranged by melting points on the periodic table. in row they go from metals to gasses. in the row from sodium to argon, sodium is more reactive than the one on its right, magnesium.

Sorry i dont understand the question can you rephase it?