Weekend Homework

Homework Section B Questions

By Kelly Moran 

pg. 77 1-5

a.) carbon: 6 electrons 

b.) aluminum: 13 protons

c.) lead: 82 electrons

d.) chlorine: 17 protons

2.) a.) no

     b.) no

     c.) yes

     d.) no

3.) 1st column: Element symbol=Carbon

      2nd column: Element symbol=Carbon

      3rd column: There are 20 protons and electrons

      4th column: Element symbol is Platinum and there are 78 protons

      5th column: 92 protons and electrons 

4.) You cannot gain protons or else it wouldn't be the same element anymore. For example, the student changed the protons which would make the element not lead anymore. To correct this students explanation you must instead subtract two electrons to make the ion.

5.) a.)C= 12 

         C isotope= 13

         Ca= 41

         Pt= 195

         U= 238

    

     b.) Carbon has two isotopes in the table.