front 1 Match the element names with their symbols | back 1 |
front 2 Match the element names with their symbols | back 2 |
front 3 What family does calcium belong to on the Periodic Table?
| back 3 Alkaline Earth Metal |
front 4 What family does Bromine belong to on the Periodic Table?
| back 4 Halogen |
front 5 How many electrons, protons and neutrons are in 1 atom of Tin? Mass number is 118 1._______ electrons 2._______ protons 3._______ neutrons | back 5 1.____50___ electrons 2.____50___ protons 3.____68___ neutrons (118-50= 68) |
front 6 How many electrons, protons and neutrons are in 1 atom of Uranium? Mass number is 238 1._______ electrons 2._______ protons 3._______ neutrons | back 6 1.____92___ electrons 2.____92___ protons 3.____146___ neutrons (238-92= 146) |
front 7 When you diagram an atom of silicon you have ______ electrons in the first row, ______ electrons in the second row and ______ electrons in the third row. The answers are all numbers. | back 7 ___2___ electrons in the first row, ___8___ electrons in the second row and ___4___ electrons in the third row. |
front 8 Nitrogen has this many valence electrons (answer with a digit). _______ | back 8 5 Ex. Finding the Number of Valence Electrons for an Element https://www.youtube.com/watch?v=x1gdfkvkPTk |
front 9 Fluorine has this many valence electrons (answer with a digit). _______ | back 9 7 Ex. Finding the Number of Valence Electrons for an Element https://www.youtube.com/watch?v=x1gdfkvkPTk |
front 10 Convert 32.00 grams of Ni (OR "N" i) to moles. Do not type units with your answer. The atomic weight of Ni (OR "N" i) is 58.69 grams/mol | back 10 0.5452 |
front 11 Convert 0.532 moles of K to grams of K. Do not type units with your answer. The atomic weight of K is 39.10 grams/mol | back 11 20.8 |
front 12 Convert 393.00 grams of Ba (OR B a) to moles. Do not type units with your answer. The atomic weight of Ba (OR B a) is 137.33 grams/mol | back 12 2.8617 |
front 13 Convert 0.280 moles of Ca (OR C a) to grams. Do not type units with your answer. The atomic weight of Ca (OR C a) is 40.08 grams/mol | back 13 11.2 |
front 14 Convert 98.50 grams of Au (OR A u) to moles. Do not type units with your answer. The atomic weight of Au (OR A u) is 196.97 grams/mol | back 14 0.5001 |
front 15 Assume a hypothetical element X consists of 3 naturally occurring isotopes. The first isotope has a percent abundance of 56.34% and a mass of 45.45 amu. The second isotope has a percent abundance of 30.23% and a mass of 48.37 amu. The third isotope has percent abundance of 13.43% and a mass of 49.81 amu. What is the average atomic weight of element X? Report your answer to two decimal places and do not include units. Note: Element X does not exist so you will not find it on the periodic table. | back 15 46.92 (45.45)(0.5634)+(48.37)(0.3023)+(49.81)(0.1343)= 46.92 Ex. Calculate the average atomic weight when given isotopic weights and
abundances Example #4: How to Calculate an Average Atomic Weight https://www.chemteam.info/Mole/AverageAtomicWeight.html Another good one for a similar (NOT THE SAME) problem: Calculate the isotopic abundances when given the average atomic weight and the isotopic weights Sixteen Examples https://www.chemteam.info/Mole/AvgAtomicWt-Reverse.html |