One way in which Earth’s evolution as a planet can be understood is by measuring the amounts of certain isotopes in rocks. One quantity recently measured is the ratio of 129Xe to 130Xe in some minerals. In what way do these two isotopes differ from one another? In what respects are they the same?

Q: The two naturally occurring isotopes of element X are ^18X (80%) and ^19X. What is the average…

A: Average atomic mass: The average atomic mass of an element is the sum of the masses of its isotopes,…

Q: Describe the two different notations used to specify isotopes and give an example of each.

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Q: The isotopes of bromine have the following relative abundances 79Br = 50.5%,  81Br = 49.8%  State…

A: Isotopes of a same element could be in two or more forms having same atomic number but different…

Q: Fill in the blanks. Isotope 30Si4+ has: Number of protons Number of neutrons Number of electrons…

A: Given  Symbol of isotope  = Si4+30 Number of proton   = ?  Number of neutron = ?  Number of electron…

Q: Tungsten has 5 naturally occurring isotopes. These are: Isotope Isotopic mass % Isotopic…

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Q: You have a compound with the formula X₂Y. X is an isotope with a mass of 20g/mol and Y is an isotope…

A: Mass of X = 20 g/mol Mass of Y = 43 g/mol

Q: In nature, the element X consists of two naturally occurring isotopes. 107X with abundance 55.84%…

A: Given : There are two naturally occurring isotopes of element X. Abundance of isotope 1 i.e 107X =…

Q: Calculate the weighted average of a substance from space. It has an abundance of 30.0% and 70.0% for…

A: The relative abundance definition in chemistry is the percentage of a particular isotope that occurs…

Q: 2. Bromine has two naturally occurring isotopes (Br-79 and Br-81) If the natural abundance of Br-79…

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Q: ilver is composed of two naturally occurring isotopes: Ag-107 (51.839%) and Ag-109. The ratio of the…

A: First calculate the percent abundance of Ag-109.

Q: The atomic masses of 6 Li and7Li are 6.0151 amu and 7.0160 amu, respectively. Calculate the natural…

A: The natural abundance of the heaviest isotope is to be calculated.

Q: A robot spacecraft returned samples from the planetesimal 98765 ALEKS, located in the outer Solar…

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Q: 5. A sample of Rb recovered from a nuclear reactor has an unusual distribution of isotopes. If the…

A: Average atomic mass is the sum of products of mass of each isotop and it’s natural abundance. It can…

Q: There are two isotopes of an unknown element, X-19 and X-21. The abundance of X-19 is 11.51%. A…

A: Contribution = ( mass of isotope × percentage in decimal ) amu

Q: A fictional element has two isotopes and an ayomic mass of 87.08 amu. If the first isotop is 85.654…

A: Atomic mass of element ,M= 87.08 amu Mass of first isotope,  M1  = 85.654 amu Mass of second…

Q: Suppose we have three hypothetical atomic nuclei: A, B, and C. Nucleus A has 3 protons and 4…

A: According to the question, we have three hypothetical atomic nuclei:A, B, and C. Nucleus A has 3…

Q: Bromine has two naturally occurring isotopes (Br-79 and Br-81) If the natural abundance of Br-79 is…

A: Given: There are two naturally occurring isotopes of Br. The abundance of isotope 1 = 50.69 % Mass…

Q: What is the relative atomic mass of the element that consists of the following isotopes in the…

A: Given,

Q: A completely made up element called Krystogen has two naturally occurring isotopes. The atomic…

A: Weight average of any element can be obtained by adding the product of mass of each isotope and its…

Q: An unknown element X has the following isotopes: 1ºX (20.00% abundant, atomic mass = atomic mass =…

A:

Q: Thillium has two stable isotopes, T1 203 and T2 205.Knowing that the atomic weight of thillium is…

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Q: An unknown element X has the following isotopes: ²⁵X (80.50% abundant, mass = 25.03 amu) and ²⁷X…

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Q: The radioactive nuclide with the symbol 75Se is used to measure the shape of the pancreas. What is…

A: The atomic number of Se is 34 and the mass number of this radioactive nuclide of Se is 75. Atomic…

Q: Silver has an atomic mass of 107.868 amu. The Ag-109 isotope (108.905 amu) is 48.16%. What is the…

A: Isotopes are the elements with different atomic mass (mass number) and same atomic number. Here…

Q: atomic mass of this factious element.

A: Atomic mass of of one isotope(M1) =56.44 % Abundance (X1) = 42.5 % Atomic mass of 2nd isotope(M2) =…

Q: Three of the isotopes of Tellurium, Te, have mass numbers of 124, 126, and 130. Tellurium-124 has 52…

A: Isotope label is same as isotope notation and is written as follows: Xnm  is the isotope label where…

Q: Lithium has two naturally occurring isotopes, 6Li and 7Li, with masses 6.015 amu and 7.016 amu…

A: Given:- => Lithium has two naturally occurring isotopes:- 6Li =>with mass 6.015 amu 7Li =>…

Q: There are two stable isotopes of lithium. The atomic mass of lithium-6 is 6.02 amu and the atomic…

A:

Q: The hypothetical element Supposium exists in four isotopic forms. These relative masses and…

A: Suppose an element having four Isotope then,     Atomic mass=mass of isotope -1×fraction…

Q: Gallium has two naturally occurring isotopes. One of them, gallium-69, has a mass of 68.925581 u and…

A: Gallium has two naturally occurring isotopes. Mass of Gallium-69  = 68.925581 u Percent Isotopic…

Q: Magnesium constitutes about 2% of Earth’s crust and has three naturally occurring isotopes. Suppose…

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Q: You are exploring the universe in your spaceship, and you land on a planet that is very similar to…

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Q: Sort the characteristic properties of the following isotopes of nitrogen into their respective bins.

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Q: A hypothetical element X is found to have an atomic mass of 37.45 amu. Element X has only two…

A: Given, Atomic mass of element X = 37.45 amu Element X consist of two isotopes- 1. X-37 2. X-38…

Q: Gallium is a metal which forms compounds with a wide variety of uses. Some of the applications of…

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Q: suppose an element consisted of two isotopes with the masses 89.9 amu and 91.1 amu. If 1.500 x 10^-3…

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Q: Zinc has five naturally occurring isotopes with an average mass of 65.39 amu. If two isotopes,…

A: To answer: Which pair of isotopes will have the highest abundances? 64Zn, 63.9291 amu and 66Zn,…

Q: A completely made up element called Krystogen has two naturally occurring isotopes. The atomic…

A: Every atom in periodic table has some atomic mass and atomic number. When atomic number of two…

Q: 6. Calculate the atomic mass of a cosmic sample of silicon. The three silicon isotopes have atomic…

A: Given that silicon has 3 isotopesthe atomic mass of the first silicon isotope     is  = 27.9769 amu…

Q: Tinumy 190tope m There are only two naturally-occuring stable isotopes of antimony, the masses of…

A:

Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.