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If the atomic mass of bromine is 79.904 atomic mass units and bromine has two major isotopes of similar abundance both approximately 50 percent what is the atomic mass of each isotope?
Wiki User
∙ 13y ago
79Br 78.91834 50.69
81Br 80.91629 49.31
therefore:
Atomic mass of bromine element = 78.91834x0.5069+80.91629x0.4931= 79.904
Wiki User
∙ 13y ago
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How are pennies similar to isotopes?
how do you find the fractional abundance of an isotope?
What is an isotope and why are atomic masses usually in decimal form?
An isotope is a variant of the atom with the same number of protons but more or fewer neutrons. The atomic mass is an average of the isotopes of the element. The average is weighted according to the relative abundance of such 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)
What is the most common isotope Br?
It may be Bromine-79 (79Br) because it is one of the 2 stable isotopes. The other one is Bromine-81 (81Br).
The atomic mass of an atom is equal to the sum of the numbers of what?
The mass number of an atom is the average of all it's isotopes in ratio to how often an isotope occurs naturally (abundance). An isotope is a variant of an element that has a different number of neutrons, therefore causing the atom to have a different mass. The percent abundance of an isotope is converted to a fraction, and multiplied by the mass of the isotope. Then all the factional masses of different isotopes are added together. Atomic mass = (mass isotope 1)x(fractional natural abundance of isotope 1) + (mass isotope 2)x(fractional natural abundance of isotope 2) + (mass isotope 3)x(fractional natural abundance of isotope 3) For example: Hydrogen has 3 naturally occurring isotopes: Protium - Abundance - 99.985% (.99985) Mass - 1.0078 Deuterium - Abundance - .015% (.00015) Mass - 2.014 Tritium - Abundance - 0% (.000) Mass - 3.016 Atomic mass number of Hyrdogen = (.99985)(1.0078) + (.00015)(2.014) + (.000)(3.016) = 1.00795 Go look up the mass number of Hydrogen on the periodic table and it says 1.008
Is bromine an isotope ion or atom?
Bromine is a chemical element and has several isotopes.
Is bromine isotope or ion or neutral atom?
Bromine is a chemical element and has several isotopes.
What is the formula to find the natural abundance?
In chemistry, natural abundance refers to the abundance of isotopes of a chemical element that is naturally found on a planet. Its formula is given as: abundance of isotope = average atomic weight of the element / exact weight of isotope.
What is the weighted average of the isotope bromine?
Bromine's average eight is 79.904 is the answer in my reference, with more than 20 isotopes.
How are pennies similar to isotopes?
how do you find the fractional abundance of an isotope?
How do you calculate the fractional abundance of Cl-37?
The fractional abundance is calculated by dividing the abundance of the isotope of interest by the abundance of all the isotopes of the element. For chlorine-37, the percent abundance is 0.2434, or 24.34%.
List the subatomic particles and isotope symbol for bromine ASAP?
All atoms of chemical elements contain protons, neutrons (excepting the isotope H-1)and electrons. The natural isotopes of bromine are 79Br and 81Br. For the list of all isotopes see the link below.
If an element has three isotopes with known natural abundance percentages what other information is needed to find the average atomic mass of the element?
The abundance percentage of each isotope
What is the result when you total the individual percent abundance of isotopes of a given element?
How do you calculate percent abundance of an isotope?You find the isotope number and then you calculate that into a fraction and then turn the fraction into a percentage and divide it by the atomic number then times it by the mass and turn that answer into a percent and voila, there you have it.
The relative abundance of each isotope of an element determines its?
The relative abundance of each isotope of an element is used to determine its atomic mass. This is the weighted average of all naturally occurring isotopes.
How do scientists use the halflife of radioactive isotopes to date rocks and fossils?
The basic idea is to compare the abundance of a naturally occurring radioactive isotope within a material to the abundance of its decay products; it is known how fast the radioactive isotope decays.
Is bromine radioactive?
Fluorine has probable a natural radioactive isotope (F-18) but only as traces.Chlorine has a natural radioactive isotope (Cl-36) but only as traces.Bromine hasn't natural radioactive isotopes.Iodine has probable a natural radioactive isotope (I-125) but only as traces.Astatine has only radioactive isotopes.
