The barium isotope 133Ba has a half-life of 10.5 years. A sample begins with 1.1×1010 133Ba atoms.
How many are 133Ba atoms left in the sample after 4 years.
Express your answer using two significant figures.
How many are 133Ba atoms left in the sample after 30 years.
Express your answer using two significant figures.
How many are 133Ba atoms left in the sample after 190 years.
Express your answer using two significant figures.
The barium isotope 133Ba has a half-life of 10.5 years. A sample begins with 1.1×1010 133Ba...
The cadmium isotope 109Cd has a half-life of 462 days. A sample begins with 1.0×1012109Cd atoms How many 109Cd atoms are left in the sample after 340 days? How many 109Cd atoms are left in the sample after 5200 days?
The half-life for the radioactive decay of C−14 is 5730 years. If a sample of C−14 initially contains 1.7 mmol of C−14, how many millimoles will be left after 2250 years? Express your answer using two significant figures.
A radioactive sample contains 1.55g of an isotope with a half-life of 3.7 days.Part A:What mass of the isotope will remain after 5.8 days? (Assume no excretion of the nuclide from the body.)Express your answer using two significant figures.
Help please Review | Constants Periodic Table The half-life for the radioactive decay of C-14 is 5730 years. Part A How long will it take for 20% of the C-14 atoms in a sample of C-14 to decay? You may want to reference (Pages 635 - 641) Section 14.4 while completing this problem. Express your answer using two significant figures. ΥΠ ΑΣφ years Request Answer Submit Part B If a sample of C-14 initially contains 1.1 mmol of C-14, how...
A Radioactive sample contains 2.1g of an isotope with a half- life of 3.8 days. How much of the isotope in grams will remain after 10.0 days? Express the answer to 3 significant figures.
The half-life for the radioactive decay of U−238 is 4.5 billion years and is independent of initial concentration. a) How long will it take for 17 % of the U−238 atoms in a sample of U−238 to decay? Express your answer using two significant figures and in yrs b) If a sample of U−238 initially contained 1.8×1018 atoms and was formed 4.9 billion years ago, how many U−238 atoms does it contain today? Express your answer using two significant figures.
The half-life for the radioactive decay of U−238 is 4.5 billion years and is independent of initial concentration. Part A How long will it take for 14 % of the U−238 atoms in a sample of U−238 to decay? Express your answer using two significant figures. Part B If a sample of U−238 initially contained 1.4×1018 atoms and was formed 5.7 billion years ago, how many U−238 atoms does it contain today? Express your answer using two significant figures.
The half-life for the radioactive decay of U−238 is 4.5 billion years and is independent of initial concentration. Part A How long will it take for 20% of the U−238 atoms in a sample of U−238 to decay? Express your answer using two significant figures. Part B If a sample of U−238 initially contained 1.5×1018 atoms when the universe was formed 13.8 billion years ago, how many U−238 atoms will it contain today? Express your answer using two significant figures.
The half-life for the radioactive decay of C-14 is 5730 years. You may want to reference (Pages 598 - 605) Section 14.5 while completing this problem. Exercise 14.58 - Enhanced with Feedback 26 of 48 Review I Constants I Periodic Table The half-life for the radioactive decay of C-14 is 5730 years Part A You may want to reference (Pages 598 605) Section 14.5 while completing this problem. How long will it take for 30% of the C-14 atoms in...
If a sample of U−238 initially contained 1.1×1018 atoms when the universe was formed 13.8 billion years ago, how many U−238 atoms will it contain today? How long will it take for 10% of the U-238 atoms in a sample of U-238 to decay? Express your answer using two significant figures Constants| Periodic Table The half-life for the radioactive decay of U - 238 is 4.5 billion years and is independent of initial concentration. t- 6.8x108 yr All attempts used;...