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**Candium Lab** **//<---Previous Assignment - Next Assignment--->media type="custom" key="6581835"//** ** Candium Lab ** **Copy the chart and answer the questions** Background: Isotopes are atoms of the same element with the same atomic number (number of protons) but different masses due to different numbers of neutrons in the nuclei. The atomic mass of an element is the weighted average of the masses of the different isotopes. In the laboratory, an instrument called a mass spectrometer can measure the mass of each isotope and can determine the relative abundances of each isotope in a sample of an element. During this lab you will carefully measure and record data which will enable you to perform the calculations to determine the atomic mass of the fictitious element Candium. There are three isotopes of Candium – M&Mium, Skittlitium, and Reeces Piecium. In this model each piece of candy represents an atom. You will obtain a sample of Candium and determine the relative abundance and mass of each isotope in your sample. As in real elements, these isotopes each have different masses. Procedure: Data and Analysis Table:
 * Wash hands
 * Do not dispose/eat any of your sample of Candium atoms until your teacher has given you permission!!
 * Separate out all of your atoms by isotope. M&Ms have an M, Skittles have an S and Reeces Pieces are not marked. Then fill in the chart.
 * Advice - do not eat the 3 pieces of candy you weighed
 * Advice - If you do not have candy and have to weigh the colored balls and they roll off the scale, put them in a beaker and subtract the mass of the beaker.
 * || Mnmium || Skittletium || Recces Piecium || Total ||
 * Mass of 1 ||  ||   ||   ||   ||
 * Number of candy or ball of that isotope ||  ||   ||   ||   ||
 * Total Mass of Sample ||  ||   ||   ||   ||

1) What is the total mass of all samples divided by the number of all samples? 2) Why are atomic masses on the periodic table not whole numbers? 3) How are the following isotopes of hydrogen alike? Different? 1/1H and 1/2H and 1/3H 4) In a sack of marbles there are red marbles each weighing 11.50g and green marbles which each weighing 12.70g. There are 10,051 red marbles and 24,351 green marbles. Determine the mass of the average marble in the sack. 5) A lab measured the mass of two isotopes of an element. Isotope A weighted 43.25 amu and Isotope B weighed 48.44 amu. There is a **relative abundance** (how much of it there is) of 47.35% of isotope A and 52.65% of isotope B. Calculate the average atomic mass. (hint, and remember this hint, pretend that there is a sample size of 10000, then multiply 4735 times the weight of isotope A and 5265 times the weight of isotope B. Divide the answer by 10000 and it will give you the average.) Round the answer to the nearest hundredth. Another important queston 6) What is the difference between fission and fusion? Google it. Make sure you understand what it means though. And one last important question 7) after a chemical reaction takes place, how does the weight of the products compare to the weight of the reactants? (same, less, or equal) Ok, one more 8) Carbon - 14 is the same as 14/6 C. True or False?
 * IMPORTANT QUESTION**