Answer:
x-20=140
x=140+20
x=160
I think this is correct answer
Answer:
its true there is no start or end
0,1,1,2,3,3,4,4
this would be proper set notation
The answer is ; it becomes a Mg+1cation
The electron configuration of magnesium is 2.8.2
When a magnesium atom loses an electron it gains +1 charge. This is because it has an extra proton without a matching electron. It has to bind a -1 charged anion (ionic bond) or lose an extra electron (for stable electron configuration 2.8) to become stable.
