A) Mass Number
B) Protons and Electrons
C) (I think group but I'm not 100% sure on this...)
D) 12 (To work out the number of neutrons you do MASS number - ATOMIC number aka the number of protons so in this case you'd do 23-11=12)
Hope this helps
Kidkrkrrirorkreekeekerkrirr
C. single replacement. A single replacement is represented by this formula : AB + C = AC + B
No your hypothesis was only a educated guess
Unless the accepted theory was by a scientist then you must of mested up somewhere
