What is the count rate of a sample of iodine-131 after 32 days if the initial count rate is 2016 counts per minute? The half life of iodine is 8 days. Use the table below to work out your answer Number of Hal Lives - Time (In days) - Count 0 - 0 - 2016 1 - - 2 - - 3 - - 4 - -
What is the count rate of a sample of bismuth after 5 half lives if 1 half life takes 46 minutes and the initial count rate is 112 counts per minute?
Number of half lives - Time (in minutes) - Count 0 - - 1 - - 2 - - 3 - - 4 - - 5 - -
What is the count rate of a sample of technetium after 5 half lives if 1 half life takes 6 hours and the initial count rate is 2016 counts per minute? Number of half lives - Time (in minutes) - Count 0 - - 1 - - 2 - - 3 - - 4 - - 5 - -
What is the count rate of a sample of strontium after 5 half lives if 1 half life takes 50 days and the initial count rate is 192 counts per minute?
What symbol of state would be used for each of the following: a) calcium carbonate (marble chip) = b) magnesium ribbon = c) iron fillings = d) oil = e) sulfur powder = f) salt water = g) dissolved alcohol = h) bubbles of carbon dioxide =
If Nitrogen = 16, how many electrons are there?
If Nitrogen = 16, how many neutrons are there?
If Nitrogen = 16, how many protons are there?
If Aluminum = 30, how many electrons are there?
If Aluminum = 30, how many neutrons are there?
If Aluminum = 30, how many protons are there?
If Sodium = 40, how many electrons are there?
If Sodium = 40, how many neutrons are there?
If Sodium = 40, how many protons are there?
Balance the following equations: Ca + O2 = CaO N2 + H2 = NH3 Cu2O + C = Cu + CO H2O2 = H2O + O2
Balance the following equations: Na + MgF2 = NaF + Mg Mg + HCl = MgCl2 + H2 Cl2 + KI = KCl + I2 NaCl = Na + Cl2 Na + O2 = Na2O Na + HCl = H2 + NaCl K + Cl2 = KCl
