They become more stable because they achieve a full outer shell of valence electrons with the magic number of 8.
Answer:
9
Explanation:
mass number = protons + neutrons
= 4 + 5 = 9
A formula giving the proportions of the elements present in a compound but not the actual numbers or arrangement of atoms.
Though the ratio of any two atom's masses was the same on either scale, it was horribly confusing, so in 1961, a compromise was reached. Instead of using either Hydrogen, or Oxygen as the standard, the isotope of Carbon<span> with 6 </span>protons<span> and 6 neutrons in its nucleus (</span>Carbon-12<span>) was given a mass of exactly 12.</span>
That is false (please mark me brainliest)
