The last “missing” element from the first six periods waspromethium, which was finally discovered in 1947 amongthe fission products of uranium. Determine (a) the ratio ofthe number of neutrons in a 145Pm nucleus to the numberof protons, and (b) the number of electrons in a singlepromethium atom.

Q: Estimate the optimal number of neutrons for a nucleus containing 70 protons.

A: The neutrons and protons, the contents making the nucleus of an atom determine its stability.…

Q: Write the following isotopes in hyphenated form (e.g. "carbon-14") 238U O 1) Uranium - +3 2)…

A:

Q: Why is the isotope 1Ci radioactive while 35Cl and 37Cl are not? Elements with an number of protons…

A: 36Cl is radioactive and unstable because it has odd no. of protons and neutrons whereas other two…

Q: This experiment concerns kinetics and isotopes. Isotopes are atoms of an element that differ only in…

A: Radioactivity : It is the decay process by which atomic nuclei undergoes nuclear changes by loss of…

Q: Ernest Rutherford (the first New Zealander to be awarded the Nobel Prize in Chemistry) demonstrated…

A: I am solving only first three parts of the question as per the guidelines.

Q: The particle represented by X is.

A: The particle represented by X has to be identified.

Q: NUCLEAR CHEMISTRY: Consider the nuclei 117, 50 Sn. Determine its mass defect in kilograms if its…

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Q: Where are elements heavier than helium created?

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Q: Alpha ... s Beta .... Gemma .... . Aluminum Teed Lead Which of the following BEST describes Gamma…

A: The correct option is (a): An atom shoots off a photon to release energy and stabilize it's nucleus.

Q: Why is ⁴⁰₂₀Ca the most stable isotope of calcium?

A: The atoms of the same element which have the same atomic number but different mass number are called…

Q: Why are the chemical properties of all isotopes of the same element identical?

A: Atoms of the same element, having same number of protons and electrons, but differing only in the…

Q: 2. Use the following isotopes to answer the following 17 F, 135 Cs, 55 214 Po 84 write the nuclear…

A: Nuclear decay reaction: Also called as, Radioactive decay. It is reaction in which Radioactive…

Q: Sr-90 has [ Select ] neutrons than Y-91

A:

Q: Determine the number of protons and neutrons in uranium-235. Enter your answers numerically…

A: As we know that atomic number of the element equals the number of protons.  For uranium-235, Atomic…

Q: Determine the AE of Zinc-65 that emitted a proton (¹₁P). The mass of Zinc-65 is 64.55961 amu and the…

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Q: Complete and balance the following nuclear equations by including the missing particle. H+¹B-3?…

A:

Q: During a nuclear decay a 238U atom can break apart into a helium-4 atom and one other atom. Assuming…

A: The property of a nucleus emitting α, β and γ rays is known as radioactivity and the substance…

Q: What do we call the nuclides having same mass number? [A] Isotopes [B] Isobars [C] Isotones [D] Such…

A: Each atom can be divided into three sub-atomic species: Neutrons, Protons and Electrons. The atomic…

Q: We must first calculate the mass defect (Am) for 56Fe. Since atomic masses (which include the…

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Q: What is the mass number of xenon-127?

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Q: Neon and magnesium each have three stable isotopes, whilesodium and aluminum each have only one.…

A: When the various atoms are formed from same element, the atomic number remains the same with…

Q: which particle corresponds to isotope 3? 183Mt, 183W, or 109W

A: Isotopes are atoms that contain same number of protons but different number of neutrons. As a result…

Q: If the onigingl Sample o zn had a mass of l-49. what mass of Žnca can be produced in tthe reachunz…

A:

Q: For a beta (β) particle, give the number of protons:  neutrons: electrons:

A: Answer  Beta particle have -1 charge and same as the electron

Q: We must first calculate the mass defect (Am) for 56F.. Since atomic masses (which include the…

A:

Q: If an atom of Uranium, Element 92, were to absorb an Alpha particle (comprising two protons and two…

A: For a balanced nuclear reaction sum of mass number and sum of atomic numbers must be same on both…

Q: Which of the following particles has a mass of -0 amu and a charge of 1-?

A: The question is asking us to identify a particle that has a mass of 0 atomic mass units (amu) and a…

Q: We must first calculate the mass defect (Am) for 56Fe. Since atomic masses (which include the…

A: The actual mass of Iron-56 ( 56Fe26 ) is 55.9349 and mass of a proton (1H1) = 1.0078 . Here, we have…

Q: Determine the missing element -3516S----à -10e + ?

A: Balanced nuclear equation is the equation in which the sum of subscripts as well as sum of…

Q: ? + 4Ni→7Rg+¿n Express your answer as an isotope or a particle. 28

A: In a balanced nuclear reaction, number of protons and number of neutrons on either side of the…

Q: Name the isotopes of hydrogen. Which one (or more) is (are) radioactive?

A: Here, we are asked to write the name of the isotopes of hydrogen andwhich one (or more) is (are)…

Q: Which of the following is incorrectly matched? neutron : -1 atomic mass unit (amu) neutron : located…

A: A chemical element is made up of atoms, the smallest unit of ordinary matter. Atoms, whether neutral…

Q: 209Bi is the heaviest stable isotope of any element. How many protons and neutrons are present in…

A: The given data contains atomic mass of Bismuth is 209.

Q: In ______, an _ particle (identical to a helium nucleus of two protons and two neutrons) is ejected…

A: A radioactive decay in which alpha particle decays into another nuclei with a mass number reduced by…

Q: Nuclei with the same number of neutrons but different mass numbers are called isotones. Write the…

A: Nuclei with the same number of neutrons but different mass numbers are called isotones. Mass number…

Q: The correct way to write the isotopes 2Na, AI, Kr, 19r in hyphenated form is sodium-24, aluminum-29,…

A: The correct answer about hyphen notations are given below

Q: Silicon (14Si) has three stable isotopes with consecutive mass numbers. Write the complete nuclear…

A: Three Isotope are stable of silicon

Q: 203.) The naturally occurring isotope rubidium-87 decays by beta emission to strontium-87. This…

A:

Q: (1) The radioactive isotope iodine-131 is used in medical imaging as indicated on the table above.…

A: The table details the types of radioactive decays by different isotopes.

Q: An beta particle is a(n). O photon O electron O helium nucleus O hydrogen nucleus

A: A beta particle is an electron.  Charge and mass of beta particle are equal to that of electron.

Q: 4. The following nuclear reaction is known to occur: 2 H He This reaction is used in the fusion bomb…

A: Given Nuclear reaction2  H12  →  H24eEnergy is given by E = ∆mc2Mass of H12 (gievn) = 2.010410…

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.