Chemistry Test Chapter 3
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1. What are the three subatomic particles in the atom? Also give the charge, and relative
mass of each. (+9)
2. Which are stronger, nuclear forces or electromagnetic (electrostatic) forces? How do
you know that this has to be true? (+3)
3. Define what an isotope is as well as give an example. (+2)
4. Using Hydrogen that has a mass number of 2, write this isotope using the two types
of notations. (+2)
5. What does amu stand for, and explain what it means. (+3)
6. Explain why the atomic mass is usually a decimal. (+1)
7. Define a mole. (+2)
Chemistry Test Chapter 3
8. What is molar mass, and how would you find/calculate it? (+3)
9. Explain Rutherford’s experiment, and tell what two things it reveals about the
structure of an atom. (+8)
10. How many protons, electrons, and neutrons are in bromine-80? (+3)
11. Name the positive charge in the atom. Name the negative charge in the atom. (+2)
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Chemistry Test Chapter 3
12. What is the mass of 1.38 mol of N? (+3)
13. Convert 150 g of S to mols of S. (+3)
14. How many mols are in 2.25 X 1025 atoms of Zinc? (+3)
15. What is the mass in grams of 4.50 X 1012 atoms of Chlorine? (+3)
16. How many atoms are in 1.50 g of K? (+3)
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