Answer:
a mixture is a material made up of two or more different substances which are physically combined.
Answer:
i assume that it would be a gametophyte.
Explanation:
This would mean the masses of Na and Cl are 22.99g and 35.45g respectively. Therefore, the percent composition of NaCl is 39.3% sodium and 60.7% chloride.
They have the same number of protons in the nucleus, giving them the same atomic number, but a different number of neutrons giving each elemental isotope a different atomic weight.