Use the portion of the periodic table shown below to answer the questions. a portion of the first three columns of the periodic table is shown. (column one from top to bottom -11 sodium 22.990, 19 potassium 39.098, and 37 rubidium 85.468. column two -12 magnesium 24.305, 20 calcium 40.078, and 38 strontium 87.62. column three -21 scandium 44.956 and 39 yttrium 88.906. part 1: name two elements that have the same properties as potassium (k). (4 points) part 2: determine the number of protons, electrons, and neutrons present in an atom of magnesium (mg). explain how you determined your answer using complete sentences. (6 points)

part  1  sodium  and  rubidium  have  the  same  properties  with  potassium.  this  is  because sodium, potassium, and  rubidium  are  in  the  same  column that is  they  are  all  in  group  one  of  periodic  table. all  are  alkali  metals  hence  have  the  same  properties.

part  two
magnesium  have  12  neutrons,  12  protons  and  12  electrons
from  periodic  table  the  magnesium  is  atomic  number  12  and  has  a mass number of  24.305
The  atomic  number  is  equal  to  number  of  protons that   is 12
protons  value is  the  same  as  electron  value  hence  the  number  of  electron  are  also 12
 mass number=protons +neutrons  hence  
Neutron=mass number-number  of  protons  that  is  24.035-12=12  which  is  equal  to  12  neutrons

Most likely a is the answer - because  you generate   38 atp's but also consume an atp.   each atp gives approx. less than 4 kcal so probably a is the closest answer.