Please solve these two QUESTION .
its my ASSIGNMENT ​

1) because it is the total mass of protons and neutrons in an individual atom.

2) it exists in form of isotopes.

Explanation:

It is the total mass of protons and neutrons in an individual atom or isotope. Since, Atomic Mass is total mass of protons and neutrons in an individual atom or isotope and not the actual weight of an Atom.

this means that it exists in the form of isotopes and is generally in fraction.

in theory, limestone is composed principally of the compound calcium carbonate - caco3, but in reality this compound is deposited in conditions involving a number of other compounds as impurities so it ends up being a mixture of many compounds.

hope this : -)

tony (lordcaos066)

the electron configuration that you gave me has 16 electrons ergo it has 16 protons ergo it is the element sulfur.