Atoms & Molecules 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. What is the correct electron configuration for an atom of sodium (Na)?

Question 2 2. If Atom #1 has 19 protons and 22 neutrons, and Atom #2 has 20 protons and 22 neutrons, are these isotopes of the same element?

Question 3 3.

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?

(The molecular mass of carbon is 12 g/mol.)

Question 4 4. Which of the following has a positive charge and a mass of one amu?

Question 5 5. An element is defined by the number of:

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Question 6 6. Why did Democritus disagree with Aristotle?

Question 7 7. Which is the symbol for the element that contains six electrons in each of its neutral atoms?

Question 8 8. Which element has a mass number of 12 and contains 6 neutrons?

Question 9 9. ALL atoms of the same element have:

Question 10 10. Which scientist is credited with discovering the charge of individual electrons?

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Question 11 11. What did Rutherford discover in his gold foil experiment?

Question 12 12. If only one type of atom makes up a substance, what can you call this substance?

Question 13 13. Who first coined the term atom, meaning indivisible?

Question 14 14. What is the maximum number of electrons that can be found in a 5p cluster (or orbital) of a single atom?

Question 15 15. Which block is manganese (Mn) located in?

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

Question 17 17. The ability of iron to react to oxygen is an example of _____

Question 18 18. Which of the following is NOT an example of a compound?

Question 19 19. _____ properties of matter can be determined without changing composition, while _____ properties of matter must change the composition of matter.

Question 20 20. 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 21 21. A tenth of a mole of pennies contains how many pennies?

Question 22 22. What does the atomic number represent?

Question 23 23. Pure substances are further divided into elements and compounds. Which one best describes the rust found on a vehicle over time?

Question 24 24.

A piece of copper wire contains 5 moles of copper atoms. What is its mass?

(The molecular mass of copper is 63.5 g/mol.)

Question 25 25. The nucleus of an atom:

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Question 26 26.

A piece of aluminum foil has a mass of 27 grams. About how many atoms does this contain?

(Aluminum has a molecular mass of 27 g/mol.)

Question 27 27.

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

(The molecular mass of silicon is 28 g/mol.)

Question 28 28. The mass number indicates:

Question 29 29. Particles that are found in the atomic nucleus are:

Question 30 30. Ocean water is a good example of a mixture because _____

Atoms & Molecules Chapter 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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