0.25 miles of sodium chloride is dissolved to make 0.05 liters of solution. What is the molarity
A: 2 M
B: 5 M
C: 4 M
D: 3 M

c. electrical charges of ionic bonds.

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Ithink about 50 % of an original isotope's number of atoms remain

13 protons and 14 neutrons.  this also means that the amount of electrons also is 13 because electrons have the same amount as protons..the atomic number means the amount of protons (which effectively tells you the electrons) the atomic mass, tells you the amount of protons and neutrons in the nucleus.hope this .