One mole of radium has an activity of 1/3.7
Web13. feb 2010. · Science Advisor. 21,068. 5,177. From the mass of Ra 226, one can determine the number of atoms. Then one may use the definition of activity, which is: A = … WebRadium now has few uses, because it is so highly radioactive. Radium-223 is sometimes used to treat prostate cancer that has spread to the bones. Because bones contain calcium and radium is in the same group as calcium, it can be used to target cancerous bone cells. It gives off alpha particles that can kill the cancerous cells.
One mole of radium has an activity of 1/3.7
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WebOne mole of radium has an activity of 1/3.7 killo curie. Its decay constant will be A 61×10 −10s −1 B 10 −10s −1 C 10 −11s −1 D 10 −8s −1 Medium Solution Verified by Toppr …
WebTherefore, its half-life is t1/2 = 98.0 12.7 = 7.72 years. So, the initial mass gets halved every 7.72 years. Sometimes, if the numbers allow it, you can work backwards to determine an element's half-life. Let's say you started with 100 g and ended up with 25 g … WebYou can find the half-life of a radioactive element using the formula: where t1/2 is the half-life of the particle, t is the elapsed time, N0 is the quantity in the beginning, and Nt is the quantity at time t. This equation is used in the calculator when solving for half-life time. Exponential decay applications
Web15. sep 2024. · Over a period of 4 half-lives, the activity of the radium will be halved four times, at which point its activity will be 1.0 mCi. Thus, it takes 4 half-lives, or 4 × 1,600 y = 6,400 y, for the activity to decrease to 1.0 mCi. Exercise 11.3. 1 A sample of radon has an activity of 60,000 Bq. Web21. mar 2024. · One decay per second is called one becquerel (Bq). Even in a small mass of radioactive material, however, there are many thousands of decays or disintegrations per second. The unit curie (Ci), now defined as 3.7 × 10 10 decays per second, was originally defined as the number of decays per second in 1 g of radium. Many radioactive samples …
WebA curie was originally defined as equivalent to the number of disintegrations that one gram of radium-226 will undergo in one second. Currently, a curie is defined as 1Ci = 3.7 x 10 …
WebOne mole of a substance is equal to 6.022 × 10²³ units of that substance (such as atoms, molecules, or ions). The number 6.022 × 10²³ is known as Avogadro's number or Avogadro's constant. The concept of the mole can be used to convert between mass and number of particles.. Created by Sal Khan. jobs in tax preparationWebWhich quantity out of 4.16 x 10^23 atoms of radium, 1.33 x 10^24 atoms of argon, 1.50 x 10^20 atoms of cadmium, and 2.17 x 10^8 atoms of iron, has the greatest mass? 4.16 x … jobs in taylor county kyWeb08. sep 2024. · The corresponding mole ratios of SiO 2:C are lower than the stoichiometric ratio of 1:3. SDRHA40, 50,55,60 materials prepared in accordance with certain aspects of the present disclosure offer SiO 2:C mole ratios of 2: 15, 1:5, 11:45, and 3:10, respectively, satisfying the excess carbon criterion. As shown in FIG. 3C, heating SDRHA4o,5o at … insv playerWebOne mole of radium has an activity of 1/3.7 kilo curie. n-x10-101 2 ) 10-105-1 3) 10-11 -1 4) 10-8 s-1 Open in App Solution Verified by Toppr Was this answer helpful? 0 0 Similar … jobs in tayside scotlandWebOne of the most common units for activity is the curie (Ci), defined to be the activity of 1 g of 226 Ra, in honor of Marie Curie’s work with radium. The definition of curie is 1 Ci = 3.70 × 10 10 Bq, or 3.70 × 10 10 decays per second. ins vor runway offsetWeb12. sep 2024. · 25. Find the length of a side of a cube having a mass of 1.0 kg and the density of nuclear matter. 26. The detail that you can observe using a probe is limited by its wavelength. Calculate the energy of a particle that has a wavelength of 1 × 10 − 16m, small enough to detect details about one-tenth the size of a nucleon. insv on impatiensWeb18. feb 2024. · One gram of radium-226 undergoes 3.7 × 10 10 disintegrations per second, a level of activity that defined the curie (Ci), an early unit of radioactivity. This is an … insvrs firsttuesday