1.) What is the missing particle?
2.) Carbon-14 decays by beta emission and has a half-life of 5,730 years
a.) Write the balanced equation for this reaction.
b.) What percentage of a sample remains after 3,310 years?
3.) Bismuth-214 is an a-emitter with a half-life of 19.7 min. How long does it take for 75.0% of to decay?
1.) What is the missing particle? 2.) Carbon-14 decays by beta emission and has a half-life...
17. Carbon-14 decays by beta emission with a half-life of 5,730 years. Assuming a particular object contained 7.5 mg of 14C when it was metabolizing and now contains 0.72 mg of 14C, how old is the object? a) 91,372 yr. b)19, 372yr. c) 1,275 yr. d) 90,431 yr.
The half-life of 82 35Br is 1.471 days. This isotope decays by the emission of a beta particle. a Gaseous HBr is made with Br-82. When the bromine isotope decays, the HBr produces H2 and the bromine decay product. Write a balanced equation for the decay of Br-82. Now, write a balanced equation for the decomposition of H82Br. b If a pure sample of 0.0150 mol of HBr made entirely with Br-82 is placed in an evacuated 1.00-L flask, how...
please explain too 1) There is 1.3 radioactive carbon-14 atoms for every trillion carbon atoms in living organisms. Carbon-14 beta decays to nitrogen-14 with a half-life of 5730 years. (a) What is the activity due to carbon-14 in a 5o kg person? (Assume that 18% of the mass is carbon.) (b) Calculate Q for the decay. (c) what is the annual radiation done that a pernon e.eives fion their own arn-ht thenua C 14.003242 u N 14.003074 u 1) There...
Carbon-14 is a radioactive element with a half-life of about 5,730 years. Carbon-14 is said to decay exponentially. The decay rate is 0.000121. We start with one gram of carbon-14. We are interested in the time (years) it takes to decay carbon-14. (A) Find the value k such that P(x < k) = 0.6. (Round your answer to two decimal places.)
1.Describe what happens to a carbon-11 atom when it undergoes positron emission. The decay of a carbon-11 atom _____(options;changes a nuetron into proton, changes proton into neutron, is hit with a neutron, reconfigures its protons and neutrons) and this causes it to emit______(options; a negatively charged electron sized particle, a positively charged electron sized partticle, two atoms and several neutrons, two neutrons and two protons) 2.An atom undergoes radioactive decay according to this equation: ___. What is the identity of...
The nucleus 40K decays by emitting a Beta^- and a massless anti-neutrino, with a half life of 1.25*10^9 years. (a) Write the formula showing the products of this decay, identifying the daughter nucleus. (b) How much energy in MeV is released in the decay? (c) What fraction of the 40K that was present when the earth formed 3.5 billion years ago still remains?
A) 13N decays with a half-life of approximately 10 min to produce 13C, a stable isotope of carbon. For a 1.0g sample of 13N, after one half-life, what mass of 13N remains? What has happened to the remaining mass? B) 223Ra decays by alpha emission with a half-life of 11.43 days. For a 1.0g sample of 223Ra, after one half-life, what mass of 223Ra remains? What has happened to the remaining mass?
Tritium (3H) decays by negative beta decay with a half-life of 12.26y. To what nucleus does 3H decay to – show the equation for the decay mode; Calculate the number of Curies of activity in 1g of 3H.
Tritium, 31H, is a radioactive nucleus of hydrogen. It decays by beta emission with a 1/2 life of 12.3 years. What is the decay constant in (in/s)? What is the activity (in Ci) of a sample containing 2.5 micrograms of tritium? The atomic mass of 31H is 3.02 amu.
The half-life of Carbon-14 is 5,730 years. What is the probability that a randomly selected Carbon-14 atom will not yet have decayed in 4,000 years’ time?