I have the five isotopes of zinc, each with its percent by mass abundance and the compostition of its nucleus. Now I need to calculate the approximate Atomic Mass of zinc as I would find it in nature and listed on the Periodic Table. How do I go about doing this? in the first isotope there are 30p and 34n and the percent mass abundance is 48.89% the second isotope is 30p and 36n and 27.81% third isotope is 30p and 37n 4.11% fourth isotope is 30p and 38n and 18.57% and the fifth isotope has 30p and 40n and 0.62%.
Any help anyone can provide I would greatly appreciate!
THANKS
DavidB
Best Answer - Chosen by VotersFor each isotope calculate the mass number (# protons + # neutrons) for each atom. This is its approximate atomic mas. Then calculate the average mass for all the isotopes. Covert the percentages to decimals then multiply each mass number by the decimal of the abundance and add all the terms(64 x 0.4889) + (mass # 2 + 0.2781) + (......) + (......) + ( .....)
Atomic number 30
atomic mass 65,38
Zinc has an atomic mass of 65.4
.06x molar mass of zinc which is the atomic mass so 3.9228 g
65.38(4) g mol-1
The most common isotope of zinc is the one with mass number 64; the atomic number of zinc is 30, which means each zinc nucleus contains 30 protons, and the mass number is defined as the sum of the numbers of neutrons and protons. Therefore, the number of neutrons is (64 - 30) or 34.
This is the mass number.
Zinc has an atomic mass of 65.4
The atomic number of all isotopes of zinc is 30. You can find it on the periodic table.
65.39amu
Zink is a meta element. Atomic mass of it is 65. Atomic number of it is 30.
.06x molar mass of zinc which is the atomic mass so 3.9228 g
65.38(4) g mol-1
Zink is a non metal element. Atomic Mass of it is 65.39.
The formula of zinc fluoride is ZnF2. Therefore, its molar mass is the sum of the atomic mass of zinc and twice the atomic mass of fluorine: 65.39 + 2(18.999) = 103.39; the last digit is depressed because it may not be significant, since the atomic mass of zinc (at least in my reference) has only four significant digits.
Properties of Zinc : Atomic number; 30 Atomic Mass; 65.37g.mol Melting Point; 420 C Boiling Point 907 C
The most common isotope of zinc is the one with mass number 64; the atomic number of zinc is 30, which means each zinc nucleus contains 30 protons, and the mass number is defined as the sum of the numbers of neutrons and protons. Therefore, the number of neutrons is (64 - 30) or 34.
This is the mass number.
Zinc ahas the following isotopes in nature each pof which has different number of neutrons. zinc-64, 66, 67, 70. There are many synthetic unstable isotopes - The atomic number of zinc is 30 so the most common isotope has zinc-64 has 64-30 neutrons = 34 in all