2-34 There are only two naturally occurring isotopes of antimony.121Sb (120.90 amu)and123Sb (122.90 amu). The atomic weight of antimony given in the Periodic Table is121.75. Which of the two isotopes has the greater natural abundance?

Q: You have discovered a new element - Bluehenium (Bl).  It has two naturally occurring isotopes 68Bl…

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Q: A hypothetical element has two isotopes: I = 62.00 amu and II = 66.00 amu. If the atomic mass of…

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Q: Three magnesium isotopes have atomic masses and relative abundances of 23.985 amu (79.99%), 24.986…

A: The atomic of an element = Σ Atomic mass ( Isotope ai ) X Abundance (Isotope ai) Atomic masses and…

Q: There are two naturally occurring isotopes of chlorine. 35 Cl has a mass of 34.9689 u. 37 Cl has a…

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Q: Copper has two naturally occurring stable isotopes, 63Cu (isotopic mass = 62.9296 amu) and 65Cu…

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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: In a naturally occurring sample, 19.8% of boron atoms have five neutrons and 80.2% have six…

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Q: There are only two naturally occurring isotopes of antimony: 121Sb (120.90 amu) and 123Sb (122.90…

A: Given that: Atomic weight of isotopes of Antimony is, Sb-121 = 120.90 amu Sb-123 = 122.90 amu Atomic…

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: Q1* Rubidium has two naturally occurring isotopes, rubidium-85 (atomic mass=84.9118 amu;…

A: We have given the masses and isotopic abundance of three isotopes of rubidium. Isotopes of an…

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: Q1:Silicon has three naturally-occurring isotopes: 92.23% of 28Si, with an atomic weight of 27.9769…

A: Given data,Atomic weight of 28Si=27.9769amuPercent isotope of 28Si=92.23%Atomic weight of…

Q: uppose a new element is discovered and it has two stable isotopes. One isotope has a mass of 73.372…

A: When an element has more than one isotope, then we will take average atomic mass to calculate…

Q: Magnesium has three naturally occurring isotopes, 24Mg (isotopic mass = 23.9850 amu, abundance =…

A: Given data contains, Isotopic mass of 24Mg is 23.9850 amu. Abundance of 24Mg is 78.99%. Isotopic…

Q: Antimony has two naturally occurring isotopes: Sb-121, with mass 120.90 amu and a natural abundance…

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Q: On a planet in another galaxy, tellurium exists as only two isotopes, Te123 and Te130. The masses…

A: The average atomic mass of element can be calculated by adding the masses of the isotopes each…

Q: 2. In the previous example, you added 4 Boron-11 isotopes to 1 Boron-10 to make the average atomic…

A: given, to form a mixture, we added number of boron-11  = 4  number of boron- 10 = 1

Q: Boron has two possible isotopes. Based on the average atomic mass on the Periodic Table (10.81 amu),…

A: Boron is an inorganic element with atomic no. 5. It exists in two different isotopes, .e. Boron-10…

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

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Q: 2- Give an example of two different elements from periodic table which have different isotopes and…

A: An isotope is a variation of an element that possesses the same atomic number but a different mass…

Q: The element boron has two stable isotopes: boron-10 (10.0129 u) and boron-11 (11.0093 u). The…

A: Given : There are only 2 naturally isotopes of boron i.e B-10 and B-11. The average atomic mass of…

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

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

Q: An element has two isotopes, X1⁹ and X²¹. If the mass of element X is 20.2u, determine the…

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Q: What is the average atomic mass of chlorine if the mass of one isotope is 34.97 amu and has a per…

A: The average atomic mass of an element can be calculated as shown below.

Q: Tennessine has two naturally occurring isotopes.  Tennessine-293 has an atomic mass of 292.9498 and…

A: Given  Atomic mass of Tennessine -293 ( m1 )  = 292.9498 amu Atomic mass of Tennessine - 296 ( m2 )…

Q: Calculate the atomic mass of silicon. The three silicon isotopes have atomic masses and relative…

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Q: Pb has an average atomic mass of 207.19 amu. The three major isotopes of Pb are Pb-206 (205.98 amu);…

A: In order to calculate the percent abundance of the isotopes we have to make use of average masses of…

Q: Potassium (K) has two stable isotopes: 39 and 41K. Based on the average atomic mass of potassium…

A: The average atomic mass of an element is calculated by taking the weighted average of the masses of…

Q: The element lanthanum has an atomic weight of 139 and consists of two stable isotopes lanthanum-138…

A: The objective of the question is to find the mass of the isotope lanthanum-139. The atomic weight of…

Q: A sample of lithium consists of 400 atoms. 30 atoms are the isotope Lithium-6 (6.015 amu) and 370…

A: Calculation of average atomic mass using % abundance of isotopes:

Q: 5. A sample of Magnesium contains three isotopes and its average atomic weight is 24.35 amu. If the…

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Q: In the world of electronics and semi-conductors it is vitally important to use the correct weights…

A: IsotopeExact atomic mass (amu)relative abundance…

Q: There are two naturally occurring isotopes of europium, 151Eu(151.0 amu) and 153Eu(153.0 amu). If…

A: Given information:Two isotopes of europium, 151Eu (151.0 amu) and 153Eu (153.0 amu)Atomic mass of Eu…

Q: Element X has two naturally occurring isotopes, 20X with a mass of 19.99 amu and 22X with a mass of…

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Q: An element has three naturally occurring isotopes with the following masses and abundances: Isotopic…

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Q: Isotope 25Mg2+ has: Number of protons Number of neutrons Number of electrons Mass number

A: Given :-  25Mg2+  To calculate :-  number of protons  number of neutrons  number of electrons  mass…

Q: OBo and F have the same number of neutrons. O"c and "N are isotopes of each other because their mass…

A: Atomic number = number of protons =number of electrons (for neutral element) Atomic mass = number of…

Q: Potassium has three naturally occurring isotopes: 19 relative abundance =93.26% isotopic mass =…

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Q: Atmospheric argon is a mixture of three stable isotopes 36Ar, 38Ar, and 40Ar.  Use the information…

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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.