Henry Moseley hypothesized that the position of an element on the periodic table was determine by the exact mass of the nucleus. the radioactive half-life of the atom. the number of positive charges of the nucleus. the exact size of the atom.

Q: The heaviest stable nucleus is an isotope of A. platinum. D. bismuth. B. gold. E. xenon. C. lead.

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Q: Match the alpha decay products of the following elements: Drag the boxes to match the answers 91 Pa…

A: Alpha particle (α)can be represented as: It contains 4 mass number and 2 atomic number.

Q: 13. How should the angle of deflection of an a particle by a nucleus vary with the closeness of the…

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Q: When a particle is massless (that is m≈ 0, describe its energy with an equation.

A: Energy can be defined as a quantity that is conserved It means energy can neither be created nor be…

Q: -rays consist of fast-moving electrons. A) Beta B) Gamma c) Alpha D None of these E

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Q: A sample containing 1.00X 10 stored for 135 day s will remain at the end of the storag e period of…

A: Reaction in which rate is linearly depend upon one reactant is known as first order reaction.

Q: Match the Beta decay products of the following elements: Drag the boxes to match the answers 76Os…

A: Beta decay is a type of radioactive decay in which the ejection of fast moving beta particles from…

Q: Which isotope is most likely unstable? OB O 160 O 20 10 72Rb 37

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Q: In 2010, a team of scientists from Russia and the United States reported creation of the first atom…

A: Given: The synthesis of the first atom of 117 element involves the collision of a target by ions of…

Q: This is the heaviest naturally occurring element  A) 87Fr B) 94Pu C) 92U D) 103Lr E) 102No

A: This is the heaviest naturally occurring element-

Q: . Given 24/14 Si, a) Find the number of protons, electrons and neutrons in the neutral atom.

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Q: In the following nuclear equation what particle is A? 21083BI - A + 210 84P0 and then 210 84PO → B +…

A: The radioactive deacy are of following type: α-decay = In this decay helium nuclei is emitted from…

Q: in the equation 228/90Th -------> 228/91Pa + x which particle is represented by X?

A: The term atomic number is used to describe the total number of protons which are present in the…

Q: You just started a new job and a fellow researcher found a fossil that they believed to be 20,000…

A: Given: Half-life of the new isotope = 2000 years. And the actual age = 4000 years.

Q: Which of the following does not describe beta particles? A. Beta particles can be stopped by a sheet…

A: Beta particle (β) is a type of high speed radiation with a negative charge.

Q: Electron capture leads to the: A emission of an electron from the second shell in an atom. B…

A: Electrons capture leads to the  A) emission of an electron from the second shell in an atom.  B)…

Q: Which form of nuclear radiation has the lowest energy? alpha radiation x-radiation beta radiation…

A: Nuclear radiation is defined as the energy particles or rays that are given off from a radioactive…

Q: _____→233 U 92+0 e -1 Express your answer in isotopic notation.

A: According to the law of conservation of atomic mass and number, the unknown element can be…

Q: Why would a scientist prefer to use the graph of radiation intensity versus (1/distance)^2 as…

A: A number of physical properties (like the force , intensity between two system) get smaller as they…

Q: While studying the properties of a sample of material obtained from an excavation site, you discover…

A: A gamma ray, or gamma radiation (symbol γ or. ), is a penetrating form of electromagnetic radiation…

Q: Identify the isotope formed when an atom captures a neutron, You may use your Periodic Table to…

A: The objective of the question is to identify the isotope when following atom captures a neutron.

Q: Element X is a radioactive isotope such that every 28 years, its mass decreases by half. Given that…

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Q: Results of Firing Alpha Particles at Gold Foil Observation Proportion: Alpha particles went straight…

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Q: A certain radioactive isotope has a half-life of 10 years. How long will it take a 250 gram of this…

A: Given that half life of isotope is 10 years.

Q: The overall hydrogen burning reaction in stars can berepresented as the conversion of four protons…

A: The change in the mass during the nuclear reaction is; total mH=4×mH=4×1.007825 μtotal mH=4.0313…

Q: Results of Firing Alpha Particles at Gold Foil Observation Proportion: Alpha particles went straight…

A: The given table is the experimental analysis of Rutherford's gold foil eperiment, He sends a  narrow…

Q: Calculate the energy needed to divide the Carbon‐12 nucleus into three identical parts.

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Q: Even with modern lab techniques, you cannot change the half life of an element.

A: Applying isotope exchange technique which are surrounded by radioactive isotope.

Q: Which are the three basic parts of the nuclear theory of the atom?

A: The nuclear theory of the atom is given by Rutherford which has the following basic parts. In the…

Q: What is the maximum wavelength of a  γ  ray that could break a deuteron into a proton and a neutron?…

A: The threshold energy of gamma rays required dissociating deuteron into proton and neutron is 2.22457…

Q: Complete and balance the following nuclear equations by supplying the missing particle: (a) 4N + He…

A: Since this question contains multiple subparts, the answer for part(a) is given below. Kindly repost…

Q: What do you mean by the term neutrino?

A: The term neutrino has to be defined.

Q: The nuclear atom model proposed by Ernest Rutherfort is based on Rutherford's observation of the…

A: Concept is based on Ernest Rutherfords atomic model

Q: Sodium is an artificial isotope with a half-life of 2.6 years a.) How many protons are in an atom…

A: Given Sodium-22 is an artificial isotope with a half life of 2.6 years. a) Number of protons are in…

Q: Discuss the principle of operation of He-3 based neutron detectors.

A: Neutron detectors detect the neutrons in the machine.

Q: A subatomic particle is located in the outermost shell of an atom. Due to its location, the particle…

A: Atomic structure schematic

Q: Identify the particle represented by X 235U + ồn 18zr + 135Te + 2X 404 в

A: Given, 23592U + 10n → 9940Zr + 13552Te + 2X

Q: The table to the right gives the number of protons (p)and neutrons (n) for four isotopes. (a) Write…

A: A chemical element can be represented by the notation  XZA , where A is the mass number, X is the…

Q: Calculate the maximum kinetic energy of the electron in the decay "C→ "N + -e +D

A: 146C -------> 147N  +  0-1e + energy E = ∆mc2      = ∆m* 931.5 MeV / 1u ∆m = mass defect…

Q: Write the shorthand notation for an isotope of Fluorine that has an atomic number of 9 and 11…

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Q: The range of radiation depends upon which factors?

A: The EM spectrum is generally divided into seven regions, in order of decreasing wavelength and…

Q: Give the nuclear symbol for the isotope of gallium, Ga, that contains 40 neutrons per atom. Replace…

A: It is given that the nuclear symbol of Gallium needs to be written which has neutrons a general…

Q: Identify the particle represented by X 235U + ön 40Zr + 13Te + 2X 99 402r + ... B)

A: In a nuclear reaction, we need to balance it to obey the law of conservation of mass.  So, we can…

Q: 10. Why is the temperature of cosmic background radiation important to the Big Bang theory?

A: The Big Bang theory is the prevailing cosmological model explaining the existence of the observable…

Q: Why is electron capture accompanied by the emission of an X-ray?

A: Radioactive decay is the process in which the nuclide emits certain radioactive radiations that can…

Q: 11. Among all the Group 18 elements, which one is found to possess radioactive property? A. Xenon В.…

A: Noble gases are the element present in 18th group of periodic table having stable electronic…