Question

Must be in a paragraph form. Explain clearly. Must site examples also.

Answer 1

A property closely connected to an atom’s mass number is its atomic mass. The atomic mass of a single atom is simply its total mass and is typically presented in atomic mass units or amu. Aside from that, an atom of carbon with six neutrons, carbon-12, has an atomic mass of 12 amu. Other atoms don’t generally have round-number atomic masses for reasons that are a little beyond the scope of this article. In general, though, an atom's atomic mass will be very close to its mass number, but will have some deviation in the decimal places.

Since an element’s isotopes have different atomic masses, scientists may also determine the relative atomic mass—sometimes called the atomic weight—for an element. The relative atomic mass is an average of the atomic masses of all the different isotopes in a sample, with each isotope's contribution to the average determined by how big a fraction of the sample it makes up. The relative atomic masses that was provided in periodic table entries such as the one for hydrogen, below are being solved for all the naturally occurring isotopes of each element, weighted by the abundance of those isotopes on earth. Extraterrestrial objects, like asteroids or meteors, might have very different isotope abundances.

Atoms of every element has different amount of characteristic of protons. Actuallyt, the amount of protons identifies what atom we are looking at. The amount of protons in an atom is also known as the atomic number. On the other hand, the amount of neutrons for a particular element can depend. Forms of the same atom that differ only in their number of neutrons are called isotopes. Together, the number of protons and the number of neutrons determine an element’s mass number: mass number = protons + neutrons. If you want to solve how many neutrons an atom has, you can just simply subtract the number of protons, or atomic number, from the mass number.