QUESTION 8 The atomic mass of rhenium is 186.2. Given that 37.1% of natural rhenium is rhenium-185, what is the other stable isotope? O a. 187 O b. 190 75 Re O c. 189 75 Re d. Re O e. BRe

Q: How many protons, neutrons, and electrons are there in a neutral atom of 199F? #neutrons # electrons…

A: Given symbol of the atom = 919FNumber of protons = ?Number of neutrons = ?Number of electrons = ?

Q: 1. There are 2 main elements. H. One element contains 26 protons and another of 29 protons. III.…

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Q: is not used to make Portland Cement a Calcareous Rocks b. Argillaceous Rocks c. Siliceous d. Sands…

A: 1.  B option is correct. CO2 Carbon dioxide is emitted as a by-product of clinker production, an…

Q: How many protons (P), neutrons (n) and electrons (e) are present in 18173Ta-3 ? a. 76 p 105 n 73 e…

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Q: There are ______electrons and _____ neutrons in the ion of  P–3 . Atomic number: 15 Mass number :…

A: The protons, neutrons, and electrons are the salient features of an atom. The protons present in the…

Q: 108. Determine the number of protons and neutrons in each isotope of chromium and use the listed…

A: Those atoms of an element which have same atomic and different mass number are known as the Isotopes…

Q: 9. Element X has two naturally occurring isotopes; 10x with a percent abundance of 85% and 12x with…

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

Q: There are electrons and +2 neutrons in the ion of Cd Atomic number: 48 Mass number : 112 O A. 46, 48…

A: Given ion,    Cd2+ ion    Mass number = 112    Atomic number = 48

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: How many protons (p), neutrons (n), and electrons (e) are in one atom of  23  12   Mg  ? (*23 is the…

A: Mg is an Alkaline Earth Metal (Group 2) element. Atomic No. of Mg = 12 Mass No. of Mg = 23

Q: Calculate the atomic mass element "X" if it has 2 naturally occuring isotopes withthe following…

A: Percent abundance of X-51 = 67.88 %  Percent abundance of X-53 = 32.12 %

Q: 2. The isotope of iodine with a mass number 131 is often used in medicine as a radioactive tracer.…

A: We know that, Number of proton= Atomic number=no. of electron (when no any charge present) no. of…

Q: An isotope of iron has a positive charge of 2 and 24 neutrons. How many electrons does it have? a.…

A: They have the same atomic number and position in the periodic table, but differ in nucleon numbers…

Q: 9. Which isotope is used in many smoke detectors for homes and businesses to measure levels of toxic…

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Q: A hypothetical element, E, has two stable isotopes: E-46-46.046 u 64.08% E-51 = 50.826 u %3D 35-92%…

A: m1 = 46.046 , f1 = 64.08100 = 0.6408 m2 = 50.826 , f2 = 35.92100 = 0.3592 m1 and m2 are the mass if…

Q: Bromine (Br) has two isotopes, with masses of 78.92 and 80.92 amu. What is the natural abundance of…

A: given, the two isotopes of bromine with masses heavier isotope = 80.92 amu lighter isotope = 78.92…

Q: 13. Calculate the percentage of bromine atoms that have a mass of 78.9183 amu and the percentage…

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Q: 3) A tiny speck (8.3 x 107 mol) of radioactive americium-241 is used in smoke detectors. How many…

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Q: Lithium has two stable isotopes: Lithium-6 and Lithium-7. Which isotope is the most abundant of the…

A: The different variants of a particular element, that are differed by the number of neutrons. In…

Q: 4. Which is a pair of isotopes? 238.. a. b. C. • d. 238 U and 92 59 27 Co and 27 Al 1341 and 39. K…

A: Which of the following is a pair of isotopes?

Q: A sample of gallium contains two isotopes and its atomic weight is 69.72 amu. If the sample is…

A: Isotopes can be defined as the members of same family having same atomic number but different mass…

Q: Silicon has three isotopes: Silicon-28, Silicon-29, and Silicon-30. Which isotope is the most…

A: •So basically this question is based on mass of elements calculated from their isotopes and their…

Q: The following table presents the abundances and masses of the isotopes of germanium. What is the…

A: Calculation of atomic weight of germanium:

Q: In an alternate universe there are only two naturally occurring isotopes of iron. 58Fe //mel Bey Pun…

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Q: How many protons, neutrons, and electrons are contained in each of the following atoms or ions?…

A: In a neutral atom, atomic number = Number of protons = Number of electrons.  Number of neutrons(n) =…

Q: What is the atomic weight of a hypothetical element consisting of two isotopes, one with mass =…

A: We have to calculate the average atomic weight of the given element using the mass and abundance of…

Q: How many protons, neutrons, and electrons are in 119Sn2+? a. 50 p, 69 n, 48 e- b. 50 p, 69 n, 50 e-…

A: The number of electrons, protons, neutrons found in 119Sn2+ has to be determined.

Q: Antimony Sb has two stable isotopes 121 Sb (at mass 120.904 amu) with a natural abundance of 57.36 %…

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Q: Strontium naturally exists as 4 stable isotopes with masses of 84, 86, 87, and 88. Which statement…

A: Elements exist in different isotopic forms and each form has its own abundance.

Q: 52. What number of protons and neutrons are contained in the nu- cleus of Tach of the following…

A: Let us consider an element AXZ . Where  A is mass number and Z is atomic number. Mass number is the…

Q: 410 186 412Z X 410 183 Y 186 Which two are isotopes? A. X and Y B. X and R C. Y and R D. Z and R E.…

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Q: 17.A hypothetical element X is found to have an atomic mass of 37.45 amu. Element X has 2 isotopes,…

A: Given that mass of X-37 = 37.24   Let x be the mass of the other isotope  Fractional abundance of…

Q: Determine the number of protons and the number of neutronsin each isotope.a. 14/7N b. 23/11Na c.…

A: Concept Introduction: An element consists of same type of atoms. An atom is composed of certain…

Q: Isotope Relative Isotope Mass Abundance 18HO 17.990 amu 78.920%, 20HO ? ?

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Q: Pb undergoes four decay reactions: B, a, B, B. Step 1. 214 Pb undergoes ß decay to give 1“Bi 82 Step…

A: Nuclear reaction: The given reaction is a nuclear reaction. In the nuclear reaction, one nuclide is…

Q: A certain element X has four isotopes. • 4.350% of X has a mass of 49.94605 amu. • 83.79% of X has a…

A: From part B, Average atomic mass of element X = 52 amu Mass of electron = 9.1× 10-31 kg mass of an…

Q: Naturally occurring uranium has three isotopes. Calculate the atomic mass of uranium with these…

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.