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

Question 2 2. 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?

Question 3 3. Who stated that matter is made of atoms?

Question 4 4. Which of the following describes Rutherford's model of the atom?

Question 5 5. The electron configuration of Carbon is 1s^2 2s^2 2p^2. How many electrons does Carbon have?

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Question 6 6. The energy of an orbital is represented by which letter?

Question 7 7. When working with atomic orbitals and quantum numbers, if n = 2, then l can be which of the following values?

Question 8 8. A(n) _____ is a representation of the arrangement of electrons in an atom of an element. 

Question 9 9. What is the main difference between two isotopes of the same element?

Question 10 10. The mass number of Nitrogen is 14, and its atomic number is 7. Therefore, Nitrogen has:

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Question 11 11. The atomic number of oxygen is 8. Therefore, oxygen atom has:

Question 12 12. How many moles of silver (Ag) atoms are there in 3.80 x 10^24 silver atoms?

Question 13 13. How many atoms are there in two moles of helium gas?

Question 14 14. Which magnetic quantum numbers are possible for p orbitals?

Question 15 15. Which of the following scientists discovered the electron charge using the 'oil drop experiment'?

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Question 16 16. Who first coined the term atom, meaning indivisible?

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

Question 18 18. What is the principal quantum number for the last electron that is added to potassium?

Question 19 19. What is the largest principal quantum number that a calcium electron can have?

Question 20 20. When an electron moves from an excited state to a ground state, it will _____.

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Question 21 21. Why should you avoid looking directly at magnesium burning?

Question 22 22. Which is the symbol for the element that contains six electrons in each of its neutral atoms?

Question 23 23. What should the electron configuration for neon (Ne) end with? Is it going to be a stable atom or a reactive atom?

Question 24 24. 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 25 25. A computer chip contains 1.20 x 10^23 atoms of silicon. What is its mass?

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Question 26 26. X and Y are elements that are isotopes to each other. Which of the following is true about X and Y?

Question 27 27. The average atomic mass or atomic weight found on the periodic table is _____.

Question 28 28. Which element has a mass number of 12 and contains 6 neutrons?

Question 29 29. The nucleus of an atom:

Question 30 30. Which of the following was the instrument used for the discovery of the electron?

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!

Chemistry 101: General Chemistry  /  Science Courses
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