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Atom Chapter Exam

Exam Instructions:

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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Question 1 1. How many atoms are there in two moles of helium gas?

Question 2 2. How many moles of silver (Ag) atoms are there in 3.80 x 10^24 silver atoms?

Question 3 3. When working with atomic orbitals and quantum numbers, if n = 2, then l can be which of the following values?

Question 4 4. A(n) _____ is a representation of the arrangement of electrons in an atom of an element. 

Question 5 5. The energy of an orbital is represented by which letter?

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Question 6 6. The electron configuration of Carbon is 1s^2 2s^2 2p^2. How many electrons does Carbon have?

Question 7 7. The atomic number of oxygen is 8. Therefore, oxygen atom has:

Question 8 8. The mass number of Nitrogen is 14, and its atomic number is 7. Therefore, Nitrogen has:

Question 9 9. Which magnetic quantum numbers are possible for p orbitals?

Question 10 10. What is the main difference between two isotopes of the same element?

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Question 11 11. Which of the following scientists discovered the electron charge using the 'oil drop experiment'?

Question 12 12. Which of the following describes Rutherford's model of the atom?

Question 13 13. Who stated that matter is made of atoms?

Question 14 14. Why did Rutherford concluded that gold atoms are mostly made of empty space?

Question 15 15. Which of the following scientists would say that atoms are like plum pudding, where the raisins are negative charges and the rest of the space has positive charges?

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Question 16 16. Which of the following was the instrument used for the discovery of the electron?

Question 17 17. Which scientist is credited with discovering the charge of an electron?

Question 18 18. A piece of pencil graphite (made of carbon atoms) has a mass of 0.12 grams. How many moles of carbon atoms are in the lead?

Question 19 19. A computer chip contains 1.20 x 10^23 atoms of silicon. What is its mass?

Question 20 20. ALL atoms of the same element have:

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Question 21 21. Which element has a mass number of 12 and contains 6 neutrons?

Question 22 22. X and Y are elements that are isotopes to each other. Which of the following is true about X and Y?

Question 23 23. Magnesium has three common isotopes. Based on its average atomic mass, which is the most common?

Question 24 24. What is the maximum number of electrons that can be found in a 5p cluster (or orbital) of a single atom?

Question 25 25. What should the electron configuration for neon (Ne) end with? Is it going to be a stable atom or a reactive atom?

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Question 26 26. How does the Bohr Model differ from the Rutherford model?

Question 27 27. When an electron moves from an excited state to a ground state, it will _____.

Question 28 28. Which letter orbital corresponds to l = 2?

Question 29 29. Which quantum number indicates the position of the orbital?

Question 30 30. What did Rutherford discover in his gold foil experiment?

Atom Chapter Exam Instructions

Choose your answers to the questions and click 'Next' to see the next question. You can skip questions if you would like and come back to them later with the "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. You will lose your work if you close or refresh this page. Good luck!

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