Write the electron configurations of the following elements in both the long and short forms for potassium (atomic number 19)

Explanation:

potassium

   number of electrons = 19

  K  =    2  electrons             L =      8 electrons         M = 9 ELECTRONS

1s², 2s²,2p6 , 3s2 , 3p6 4s 1

i think it is d. e because the next one is igneous.

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