b- The radioactive nucleus Ra has a half-life of approximately 1.6 103 yr. Given that the Solar System is about 5 billion years old, why do we still find this nucleus in nature?

Q: How many kJ of energy are released to form one mole of 116Cd from protons and neutrons if the atom…

A:

Q: An 16 g sample of an isotope of Strontium-90 was formed in 1960 explosion of an atomic bomb at…

A: In what year will only 0.625 gm of strontium 90 remain?

Q: A chemist wishing to do an experiment requiring Ca+ (half-life = 4.5 days) needs 3.0 µg of the…

A:

Q: understanding

A: Dear student I have given answer to your question in the image format.

Q: What is the primary factor that determines whether an nucleus is stable or unstable?

A: The nucleus is the small region that lies at the center of an atom. It is discovered in 1911 by…

Q: A radioactive sample contains 1.55 g of an isotope with a halflife of 3.8 days. What mass of the…

A: Given details, t1/2 = 3.8 days t = 5.5 days m0 = 1.55 g To calculate the mass of the isotope. By…

Q: . A radioactive isotope has a half-life of 10 years. What fraction of the original mass will remain…

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

Q: How much energy must be supplied to break a single aluminum-27 nucleus into separated protons and…

A: The amount of energy required to break a single nucleus is calculated as follows,…

Q: If the amount of a radioactive element decreases from 2.4 g to 0.30 g in 12 days, what is its…

A: Given: Initial amount of radioactive element, N∘=2.4gFinal amount of radioactive element, N =…

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: Hassium-269 decays (eventually) to thallium-205 in a process that produces 5 electrons and several…

A: The atomic number of Hassium is 108 and given mass number is 269. It is given that the decay of the…

Q: 25. Iodine-131 is a radioactive substance that can be used to treat certain thyroid conditions. It…

A: Q25) Given that: Half life = 8 days Mass of Iodine = 40 mg Remain after 4 half lives = ?

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

A: Amount of rubidium = 123.0  μg  Amount of strontium = 5.5 μg Half life time of rubidium = 4.8 × 1010…

Q: How much energy must be supplied to break a single aluminum-27 nucleus into separated protons and…

A: Mass of Al-27 nucleus = 26.9815386 amu Mass of proton (mp) = 1.00728 amu Mass of neutron (mn) =…

Q: Tin-129 is radioactive and has a half life of 2.23 minutes. What percentage of a sample would be…

A: Answer:

Q: A theoretical isotope X-100 has an initial mass of 500g. This isotope has a half-life of 8 hours.…

A: GivInitial mass=500g Half life=8 hours

Q: An element X has 195 nucleons and 78 protons, and it undergoes a beta decay. After the decay, how…

A: The atomic number is defined as the number of protons or number of electrons present in an atom,…

Q: Compare and contrast the terms isotopes and radioisotopes

A: Isotopes are atoms of same elements which have same atomic number but different mass number. In…

Q: 1.Consider the following nuclear transmutation: U(n, B¯)X. What is the identity of nucleus X? (write…

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

Q: How much energy must be supplied to break a single aluminum-27 nucleus into separated protons and…

A:

Q: 1) According to your data, what are the approximate half-lives of the elements A, B, C, and D? A: B:…

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…

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

A:

Q: Complete each equation and name the particle ejected from the nucleus. (a) %0 →? + -iß + ♡ (b) ?- U…

A: The radioactive decay reaction involves the emission of radiation by a unstable nucleus which result…

Q: Radioactive isotopes can be used to calculate the age of materials because their decay rates are A…

A: Interpretation - To tell about radioactive isotope can be used to calculate the age of materials…

Q: 100- Using the graph to the right, answer the following questions. 90- 80- 4. What is the half-life…

A:

Q: How much heavier is an alpha particle than an electron?

A: Given, Heavier is an alpha particle than an electron

Q: How old is a skeleton that has lost 40% of its carbon-l4? Use 5,73A years as the half life of…

A: NOTE : There is a typing error in the half life of C-14 It will be 5730 year

Q: A sample contains 9,000 particles of the original isotope for every 63,000 particles of the daughter…

A: Given data : Half-life of the original isotope (t1/2) = 19 years Also given that, the sample…

Q: Q2: a- Calculate the radius and volume also the density of Gold Nuclei (Au). b- The radioactive…

A:

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

A:

Q: This exercise uses the radioactive decay model. A wooden artifact from an ancient tomb contains 80%…

A: The wooden artifact has 80% of the carbon-14 that is present in a living tree. The age of the…

Q: lodine-131, a radioactive substance that is effective in locating brain tumors, has a half-life of…

A:

Q: 32P is a radioactive isotope with a half-life of 14.3 days. If you currently have 77.1 g of ³2P, how…

A:

Q: 4. How much energy must be supplied to break a single aluminum-27 nucleus into separated protons and…

A: The amount of energy required to break a single nucleus is calculated as follows,

Q: 7. A sample contains 9,000 particles of the original isotope for every 63,000 particles of the…

A: Given: Half life of original isotope (t1/2) = 19 years Initially the number of daughter isotopes…

Q: What’s 0 -1 beta particle?

A: A beta particle is a particle with high-energy emitted by the radioactive decay of an atomic nucleus…

Q: . A radioactive parent isotope with 600 atoms. After the decay, 450 daughter atoms were produced.…

A:

Q: How many neutrons are emitted when a californium-249 nucleus (Z=98) is bombarded with a carbon-12…

A: In this question , we have given that californium is bombarded with a carbon - 12 nucleus which…

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: A 15.0-mCi (millicurie) radioactive source runs for 2.63 hours. How many atoms have disintegrated?

A: The given activity value in mCi is first converted to Ci and then to atoms/s as shown below, 1…

Q: A chemist determines that a sample of petrified wood has a carbon-14 decay rate of 6.00 counts per…

A: Record the given data, Initial Carbon-14, No = 13.6 CPM per gram Nt = 6.00 CMP per gram Half-life t…

Q: and Lare the only fissionable isotopes.

A: Nuclear reactions are those in which either the nucleus splits into form lighter nuclei or lighter…

Q: Compare the neutrons in 188RE and 188W.

A: mass number = number of protons + number of neutrons  number of neutrons = mass number - number of…

Q: proton ratio describes a radioactive element's half-life. up this concept because they wanted to…

A: We will choose Correct option

Q: Given 100.0 grams of a sample that has a half life of 3.67 days, determine the time in days for…

A: Given,  Initial mass of the sample  = 100 g  Final mass of the sample = 7 g  Half-life, t1/2 = 3.67…