The half-life of a radioactive element is 1,250 years.What percent of the atoms remain after 5,000 years?

Q: The half-life of Phosphorus-32 is 14.3 days. If you start with 100 grams of it, how long will it…

A: Half life of a first order reaction is given by , t1/2=0.693k Write the expression for first order…

Q: The first-order decay of radon has a half-life of 3.823 days.  How many grams of radon remain after…

A: Ans

Q: 7) The half life of silicon is 710 years. 40 grams are present now, how much will be present in 200…

A:

Q: The half-life of element X is 500 years. If there are initially 8 g of X, how much will remain after…

A:

Q: Radioactive radon-222, found in many homes, is a potential health hazard. The half-life of radon-222…

A: To solve this problem first we find the rate constant ( k) using half life time . Then we will…

Q: . Barium – 122 has a half-life of 2 minutes. Suppose you obtain a sample weighing 10.0 g and it…

A:

Q: 4. Iron-59, which is used to diagnose anemia, has a half-life of 45 days. What fraction of it is…

A: we know that,→ Radioactivity phenomena follow first owen                            knnetics.so,…

Q: 21. Barium – 122 has a half-life of 2 minutes. Suppose you obtain a sample weighing 10.0 g and it…

A: 21. Given that: Half life of Barium-122 = 2 mins. Time taken for the set up = 10 mins

Q: What is the half-lifeof radioactive element?

A: Breaking down of atomic nuclei of any radioactive substance gives the radiative emissions from…

Q: Tellurium-123 is a radioactive isotope occurring in natural tellurium. The decay constant is 1.7 x…

A: Radioactivity is a special property of some elements or substances by which they continuously…

Q: What is the half-life of an element that begins with 100g, and 18.8g remains after 113 minutes.

A: Half life of radioactive element-is the time needed for given number of its nuclei to decay exactly…

Q: The half-life of radioactive radium (226Ra) is 1599 years. What percent of a present amount of…

A: Chemical changes in which species amount varies linearly along with time basically obey"first-order…

Q: Barium -122 has a half life of 2 minutes. Suppose you obtain a sample weighing 10.0g and it takes 10…

A: Since the decay reactions are first order reactions. Hence the half life of reaction will remain…

Q: If 50% (1/2)of a radioactive element remains after 4000 years, what is the half-life

A: Half life of a radioactive element is the time required to disintegrate into it's half…

Q: The half-life of 129I is 1.72 x 107 years. Consider a sample that contains 2.39 x 106 atoms of this…

A:

Q: The radioisotope radon-222 has a Half-Life of 3.8 days. How much of a 73.9-g sample of radon-222…

A:

Q: A radioactive element has a half-life of 1.1 hours. How many hours will it take for the number of…

A:

Q: The half-life of mercury-203 is 46.6 days. What percentage of mercury-203 remains in a sample after…

A:

Q: 1.) Carbon-14 has a half-life of 5600 years. If you had a sample of 100% carbon-14, how much would…

A: Given, carbon-14 half life with 100 % carbon-14 sample.we are asked to calculate the amount of…

Q: The half-life of carbon-14 is about 5715 years. A sample contains 1 gram of carbon-14. How much will…

A: Formula for half life,  N (t )= No(1/2)t/t1/2 where, N (t) = quantity of the substance remaining…

Q: Carbon-11 is a radioactive istope of carbon. Its half-life is 20.3 minutes. What fraction of the…

A:

Q: Radioactive decay is typically second order.

A: True or false. Why?

Q: The half-life of a certain radioactive element is 800 years. How old is an object if only 12.5% of…

A: Given, Half Life t1/2 = 800 years. A = 12.5%  Ao = 100 %  Time , t = ?

Q: The half-life time of a radioactive element is 6.0 days. A sample of 50.0 g of this element is…

A:

Q: How many grams will be left after 100 days if you have 150 g of thorium-234 at the beginning?…

A: Given,  The mass in grams will be left after 100 days of the decay, if initial amount of Th-234 is…

Q: The half-life of radioactive chromium-51 is 28 days. If a sample of chromium-51 has a mass of 12.0…

A: Given, Half Life , t1/2 = 28 days First, calculate rate constant ,K to calculate time (t)

Q: Strontium-90 is a nuclide that is found in radioactive fallout from nuclear weapon explosions. Its…

A: Given :  Half life = 28 years

Q: Q1: If you know that the half-life of a radioactive element is equal to 20 days, find the following:…

A: Radioactive active decay generally follows a first order reaction and therefore, the rate of…

Q: Radioactive radon-222, found in many homes, is a potential health hazard. The half-life of radon-222…

A: Given Half life of Radon -222 ( t1/2 )  = 3.82 days  Initial amount of isotope ( A0 )= 33.5 mg  Time…

Q: Radioactive radon-222, found in many homes, is a potential health hazard. The half-life of radon-222…

A:

Q: The half-life of a radioactive element is 8 days. How long will it a 1.0 g sample to decay to 0.0625…

A: Radioactive decay is the process of breakdown of radioactive matter. The atomic nucleus is broken…

Q: A radioactive sample initially contains 2.40×10^−2 mol of a radioactive material whose half-life is…

A:

Q: The​ half-life of​ silicon-32 is 710 years. If 20 grams is present​ now, how much will be present…

A: Radioactive decay is always a first order reaction. The rate equation for the radioactive decay is :…

Q: The half-life of radioactive chromium-51 is 28 days. If a sample of chromium-51 has a mass of 12.0…

A:

Q: If the amount of radioactive element decreases from 2.4 g to 0.30 g in 36 days, what is its…

A: Half life is defined as the time taken by the radioactive sample to decay to half its original…

Q: Carbon-14 is a radioactive element with a half-life of about 5,730 years. Carbon-14 is said to decay…

A:

Q: The half-life of a radioactive element is 6 months. The time taken to reduce its original…

A: Given  Half life of radioactive element ( t1/2 )  = 6 month  Remaining Concentration ( At ) = 116…

Q: 11. Cesium-137 has a half-life of 30 years. What percent of the radioactive cesium parent atoms will…

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

Q: The isotope cesium-137 has a half-life of 29.75 years. How long will it take a 100 gram sample of…

A: Radioactive decay reactions are first order reactions. The calculation can be done using first order…

Q: The half-life of 90Sr is 29 years. What fraction of the atoms in a sample of 90Sr would remain 175…

A:

Q: Barium -122 has a half-life of 2 minutes.  Suppose you obtain a sample weighing 10.0g and it takes…

A:

Q: Radioactive radon-222, found in many homes, is a potential health hazard. The half-life of radon-222…

A: The half life of radon = 3.82 days. Initial amount = 37.9 mg  time = 4.70 days mass remains after…

Q: It takes 6400 years for one gram of a radioactive element to decay away to only 1/16 of a gram. The…

A: Given time = 6400 years M/M० = 1/16

Q: The half-life of cesium-137 is 30.2 y. How long will it take for a sample of cesium-137 to decay to…

A: Half life of caesium- 137=30.2 years a0=x a1/2=x/8

Q: 5. Strontium-90 has a half life of 28.8 years. If you start with a 10 gram sample of Strontium-90,…

A: We have to predict the amount after 115.2 years.

Q: One of the radioactive isotopes used in chemical and medical research is iodine- 125, which has a…

A: Given -  Half life of iodine = 61 days  Initial concentration of iodine (No) - 1 g After time t…

Writing and Balancing Nuclear Equations

A nuclear equation is a symbolic representation of a nuclear reaction using certain symbols. It is studied in nuclear chemistry and nuclear physics.