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An imaginary element Y occurs 30 of the time with a mass of 57.9 a.m.you. The remaining sample of Y has a mass of 60.9 a.m.you. What is the average atomic mass of Y?
The average atomic mass of Y would be 60.0 a.m.u.
Why do elements which exists as isotopes have fractional atomic mass?
Each isotope of an element has a different Atomic Mass, so an average is taken of all the isotopes, but the average is weighted because the natural abundance (%) of each isotope is factored in. If hydrogen-1 is much more abundant than deuterium and tritium, then the weighted average will be closer to 1 than 2 or 3 but not a whole number. The following equation shows how percent abundance factors into the weighted average. (atomic mass A)(X% abundance) + (atomic mass B)(Y% abundance)...=(weighted average of all isotopes of the element)(100% abundance)
How do you calculate the average relative atomic mass of neon?
To calculate the relative atomic mass of an element (which is by its definition an average), you need the mass number and relative abundance of each isotope present. Suppose we have the following data from the mass spectrometer: first isotope mn X, abundance A% second isotope mn Y, abundance B% third isotope mn Z, abundance C%. Then ram = (A/100 x X) + (B/100 x Y) + (C/100 x Z) If there are more than 3 isotopes, just do the same for each one and add all the expressions together.
What is the relationship between two element X and Y whose atomic numbers are 18 and 20 but their mass number remains same as 40?
There is no relationship other than having the same mass number. Element X has an atomic number of 18, which makes it the noble gas argon. The particular isotope is argon-40, which means that the atomic nuclei of this isotope of argon contain 18 protons and 22 neutrons. Element Y has an atomic number of 20, which makes it the alkaline earth metal calcium. The particular isotope is calcium-40, which means the atomic nuclei of this isotope of calcium contain 20 protons and 20 neutrons.
How do you calculate percent abundance for antimony?
The atomic mass of an element is the weighted average of the masses of its isotopes. You know that: Antimony-121 has a mass of 120.9038 u, x% abundance Antimony-123 has a mass of 122.9042 u, y% abundance There are only 2 isotopes for antimony and their percent abundances should add up to 100%. In other words: x% + y% = 100% y = 1-x (percentages written as decimals) So, now let's put everything together. In order to calculate the atomic mass, multiply the percent abundance of an isotope by its atomic mass; then add the product of all the isotopes: (Atomic Mass of Antimony-121)(Percent Abundance of Antimony-121) + (Atomic Mass of Antimony-123)(Percent Abundance of Antimony-123) = Atomic Mass of Element Antimony (120.9038 amu)(x) + (122.9042 amu)(y) = 121.760 amu Replacing 1-x for y gives: (120.9038 amu)(x) + (122.9042 amu)(1-x) = 121.760 amu Solve for x: 120.9038x + 122.9042 -122.9042x = 121.760 amu -2.0040x = -1.1442 x = 0.57096 = 57.096% Solve for y: y = 1 - x y = 1 - 0.57096 = 0.42904 = 42.904%
What is average atomic mass of y?
Yitrium is a non metal element. Atomic mass of it is 69.
An imaginary element Y occurs 30 of the time with a mass of 57.9 a.m.you. The remaining sample of Y has a mass of 60.9 a.m.you. What is the average atomic mass of Y?
The average atomic mass of Y would be 60.0 a.m.u.
How can you find average atomic mass please tell me with brief explanation?
Average atomic mass refers to the weighted average of the masses of all the isotopes of an element---weighted by their abundance on earth. To find the average atomic mass you multiply the atomic mass of each isotope by its % abundance, add them all up, and divide by 100%. For instance, say that and element had three isotopes---X, Y, and Z: X has a mass of 10 and makes up 25% of all atoms of that element found on earth. Y has a mass of 11 and makes up 40% of all atoms of that element found on earth. Z has a mass of 13 and makes up 35% of all atoms of that element found on earth. The average atomic mass would be: average atomic mass = (10*25%+ 11*40% + 13*35%)/100% = 11.45 Note: I realize my answer had too many sig figs but I wanted to keep the numbers simple while still illustrating the point that the number comes out weighted more towards the heavier isotopes.
Why do elements which exists as isotopes have fractional atomic mass?
Each isotope of an element has a different Atomic Mass, so an average is taken of all the isotopes, but the average is weighted because the natural abundance (%) of each isotope is factored in. If hydrogen-1 is much more abundant than deuterium and tritium, then the weighted average will be closer to 1 than 2 or 3 but not a whole number. The following equation shows how percent abundance factors into the weighted average. (atomic mass A)(X% abundance) + (atomic mass B)(Y% abundance)...=(weighted average of all isotopes of the element)(100% abundance)
If 6.02 x 1023 atoms of element y have a mass of 83.80 g what is the identity of y?
6.02 x 1023 atoms of an element is one mole of that element. The mole, based on Avagadro's number, is defined as the number of Carbon atoms that would have a mass of 12 grams. This is a scaling factor related to atomic mass. Krypton has an atomic mass of 83.8, so if a mole of an unknown element is 83.8 grams, then that element is Krypton.
What element has a atomic mass of 39.9?
The atomic number is the count of how many protons an atom has in its nucleus (and therefor also the count of how many electrons the neutral atom possesses). The atomic number us unique for each element and positions the element in the periodic table. The element with atomic number 39 is Yttrium (Y).
How do you calculate the average relative atomic mass of neon?
To calculate the relative atomic mass of an element (which is by its definition an average), you need the mass number and relative abundance of each isotope present. Suppose we have the following data from the mass spectrometer: first isotope mn X, abundance A% second isotope mn Y, abundance B% third isotope mn Z, abundance C%. Then ram = (A/100 x X) + (B/100 x Y) + (C/100 x Z) If there are more than 3 isotopes, just do the same for each one and add all the expressions together.
What is the relationship between two element X and Y whose atomic numbers are 18 and 20 but their mass number remains same as 40?
There is no relationship other than having the same mass number. Element X has an atomic number of 18, which makes it the noble gas argon. The particular isotope is argon-40, which means that the atomic nuclei of this isotope of argon contain 18 protons and 22 neutrons. Element Y has an atomic number of 20, which makes it the alkaline earth metal calcium. The particular isotope is calcium-40, which means the atomic nuclei of this isotope of calcium contain 20 protons and 20 neutrons.
How do you calculate percent abundance for antimony?
The atomic mass of an element is the weighted average of the masses of its isotopes. You know that: Antimony-121 has a mass of 120.9038 u, x% abundance Antimony-123 has a mass of 122.9042 u, y% abundance There are only 2 isotopes for antimony and their percent abundances should add up to 100%. In other words: x% + y% = 100% y = 1-x (percentages written as decimals) So, now let's put everything together. In order to calculate the atomic mass, multiply the percent abundance of an isotope by its atomic mass; then add the product of all the isotopes: (Atomic Mass of Antimony-121)(Percent Abundance of Antimony-121) + (Atomic Mass of Antimony-123)(Percent Abundance of Antimony-123) = Atomic Mass of Element Antimony (120.9038 amu)(x) + (122.9042 amu)(y) = 121.760 amu Replacing 1-x for y gives: (120.9038 amu)(x) + (122.9042 amu)(1-x) = 121.760 amu Solve for x: 120.9038x + 122.9042 -122.9042x = 121.760 amu -2.0040x = -1.1442 x = 0.57096 = 57.096% Solve for y: y = 1 - x y = 1 - 0.57096 = 0.42904 = 42.904%
What is the equation to find the percentage by mass of an element if the total mass of the compound and the mass contribution of the element are known?
Amount of mass of component Y divided by total mass times 100% equals (=) percent (%) Y component.
How do you calculate the atomic mass of any element?
Find the element on the periodic table. Look at the number on the top. It is the relative atomic mass. Some Elements: Na - 23, Ne - 20 If you are not given the element name but only the information of the neutrons, protons and electrons. Add the protons and neutron together as they both are the one which contribute to the mass of the atom. Electrons are small so they do not add up to the mass of atom. Example: Element - Y (contain 2 protons, 2 electron, 2 neutron) Ar is 4. From the you can find out that element is He - Helium.
What element has the atomic number less that sodium and is a metal?
Something Stupid,y?
