Element X is a radioactive isotope such that every 28 years, its mass decreases by half. Given that the initial mass of a sample of Element X is 50 grams, how much of the element would remain after 11 years, to the nearest whole

Q: 15. Write the nuclei or particle in the blank of the condensed form. a 0-1B b. 73LI c. 'on d. 'IH…

A: Please note- As per our company guidelines we are supposed to answer only one question. Kindly…

Q: prove %23 ED - EH KH e KBT

A: Here we are assuming R-H and R-D where R is a group/atom that is much heavier than H or D. Arrhenius…

Q: Which of the following processes decreases the atomic number by two?   A) gamma-ray production B)…

A: Since the atomic number is decreased by 2 Hence it means the atomic number of the particle produced…

Q: 5. An element with a mass number of 1 l and an atomic number of 5, how many neutrons does it have?…

A: 5.  Number of neutrons = mass number - atomic number                                   = A - Z…

Q: VISUALIZATION Modes of Radioactive Decay 140 130 120 110 100 90 80 70 60 50 - Stable Radioactive 40…

A: We have to  select  the correct  option from following  statements about the relative  number  of…

Q: Which pair of symbols represents nuclei with the same number of neutrons? 56Co and 5Co 5' Fe and 5Ni…

A: An element is composed of mainly three constituents i.e. neutrons, protons, and electrons. Out 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: Part A The belt of nuclear stability ends with the element bismuth O radon O polonium O astatine O…

A: To give: The belt of nuclear stability ends with which element.

Q: Which isotope is most likely unstable? 072Rb 20 Ne 10¹ 0¹B 160

A: Isotopes are members of a family of an elements that all have the same number of protons but…

Q: Indicate the number of protons and neutrons in the followingnuclei: (a) 5624Cr, (b) 193Tl, (c)…

A: Atomic number of an atom is equal to the number of protons in it. Atomic number is represented by Z.…

Q: 13N is more likely to undergo electron capture than alpha particle decay. Explain why

A: In brief the stability of a nucleus depends on n/p ration or n/z ratio (neutron to proton ration)…

Q: carbon 12 (C) The amount of particles in exactly 12g of, carbon-12 (D) The amount of substance that…

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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: Which element's nucleus is considered an alpha particle? boron O nitrogen O carbon O helium

A: Given  Particle = Alpha particle Element = ?

Q: If E=1.80009 x 10^13 J/mol of energy is required to break a single Sodium-23 nucleus into separated…

A: E=1.80009 x 10^13 J/mol of energy is required to break a single Sodium-23 nucleus into separated…

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: Nearly all of the protons and neutrons in the seven-to-one ratio at t = 225 s either formed 4He or…

A: The relative abundance of a species with respect to another provides information about the percent…

Q: What is nuclear fusion? O A. a process in which the nucleus of an atom combines with the nucleus of…

A: Fusion indicates that two or more substances are fused together.  Nuclear fusion is a reaction in…

Q: Select the isotope that has the greatest stability per nucleon. H. 56 Fe 26 131 Xe 54 23 Na 11

A: Stability of nucleons.

Q: During the decay of a radioactive element, do you generally have: O a. no new isotopes O b. many new…

A: The process in which unstable nuclei lose energy by radiation, and converts into new elements. The…

Q: Krypton consists of several radioactive isotopes, some of which are listed in the following table.…

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Q: The stability of any nucleus is determined by the difference between the repulsion and the short-…

A: According to question 4th option is  not correct that is All isotopes of the elements with atomic…

Q: 3 Which pair of symbols represents nuclei with the same number of neutrons? 56Co and 58CO S7Mn and…

A: Given element are Element Atomic number (From periodic table) Co 27 Fe 26 Ni 28 Mn 25…

Q: 1Which scientists influenced the progression of the atomic model? (Check all that apply)…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

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: 4. Complete the following nuclear equations (fill in any missing numbers - don't forget to find the…

A: Concept: In a nuclear reaction the Atomic Mass number of reactants and products are conserve.  Alpha…

Q: Which of the following nuclei has a magic number of neutrons and/or protons? none of the choices O…

A: There are some combination of proton and neutron , when these combination present in nucleus then…

Q: Describe en application of each of the following isotopes: a. techne tium -99m b. Xenon - 133

A: Isotopes mean the atoms of the element containing different mass numbers. There is same number of…

Q: Element Atomic Number: 1 Name: Hydrogen Symbol: Atomic Number: O 'H O 2H Isotope Atomic Mass:…

A: Deuterium, H12 has 1 proton and 1 neutron.

Q: The fuel for Nuclear Reactors involves the decay of Uranium-235. 235U + 'n ®93Kr + 140Ba R + 3 'n…

A: Consider the fuel Uranium-235: Calculation of number of protons and number of neutrons: The number…

Q: 2. Which isotope in each of the following pairs should be more stable? (a) Si or Si (b) Li or Li (c)…

A: Isotopes are the atoms of element having similar atomic number but different mass number. For…

Q: H If and fused to form 7N , there would be

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Q: Why does Sodium (Na) have fewer stable isotopes than Magnesium (Mg)?

A: The stable isotopes of an element depend on n/p ratio, if n/p close to 1 then it is likely to be…

Q: Element X is a radioactive isotope such that every 18 years, its mass decreases by half. Given that…

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Q: 7. When a proton turns into a neutron in a nucleus, it emits what particle? c. positron d. proton a.…

A: Radioactive decay refers to the breakdown of an unstable nucleus to a stable nucleus with the…

Q: VISUALIZATION Modes of Radioactive Decay 140 130 120 110 100 90 80 70 60 50 • Stable • Radioactive…

A: Here we have to predict the neutrons to proton ratio for atomic number 20 or less when graph is…

Q: The black squares represent stable isotopes in this plot of # neutrons vs # protons. What is the…

A: In an atom, the nucleus will be stable if it contains the given ratio or number of neutrons to the…

Q: 217 At decays by a - emission. What is the new 85 The isotope nucleus that forms? O 221 Fr 87 213 Ро…

A: • We need to determine the daughter nuclide formed by the alpha emission of given isotope.

Q: A mole of a substance can be define as 1. A The amount of substance that contain as many elementary…

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Q: Many hospitals use radioisotopes for diagnosis and treatment or in palliative care. Three…

A: An isotope is an element that has the same atomic number but with different atomic masses. An…

Q: Which of the statements are true of nuclear reactions? a. The number and types of atoms are the…

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

Q: Sulfur has four naturally occurring stable isotopes. The onewith the lowest mass number is…

A: Introduction: As we know, Atomic mass =∑isotope mass +% Isotope abundance100 We know there are four…

Q: 311 Vo 121 For the fictitious element, vaccinium, the correct information is a) atomic mass = 121,…

A: Given : a fictitious element 311121V

Q: 238 What element is synthesized from the reaction: 92U +15n > 7°-1B + _? 253 85At 25399Et 146100FM…

A: In this question, we will synthesized the element which have atomic number, element symbol and mass…

Q: Which type of nuclear radiation is being emitted here? 234 Th →234 Pa+ { 0 e 90 O alpha O beta O…

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Q: Indicate the number of protons and neutrons in the followingnuclei: (a) 12953I, (b) 138Ba, (c)…

A: a) I53129 = Atomic mass of I (Iodine) = 129 Atomic number of I = 53 Number of protons = Atomic…

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.