Atoms, Formulas, Reactions

Atoms, Formulas, Reactions - Unit 2: Atoms, Formulas and...

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Unit 2: Atoms, Formulas and Reactions – 50 point quiz (MC = 2 points each, SA = 1 point each) 1. What is the charge of the nucleus in an atom of oxygen- 17? a. 0 b. -2 c. +8 d. +17 2. What is the total number of electrons in a S 2- ion? a. 10 b. 14 c. 16 d. 18 3. Which represents an atom with atomic number of 11 and mass number of 24? a. 24 11 Na b. 11 24 Na c. 13 11 Na d. 35 11 Na 4. Atoms of different isotopes of the same element differ in their total number of a. Electrons b. Neutrons c. Protons d. Valence electrons 5. Given: F 2 (g) + H 2 (g) → 2HF(g). What is the ratio of H 2 (g) to HF(g)? a. 1:1 b. 1:2 c. 2:1 d. 2:3 6. Which lists 3 types of reactions? a. Condensation, double replacement, sublimation b. Condensation, solidification, synthesis c. Decomposition, double replacement, synthesis d. Decomposition, solidification, sublimation 7. Given: 2CO(g) + O 2 (g) → 2CO 2 (g). What is the mole ratio of CO(g) to CO 2 (g) in this reaction? a. 1:1 b. 1:2 c. 2:1 d. 3:2 8. What is the total number of different elements in NH 4 NO 3 ? a. 7 b. 9 c. 3 d. 4 9. Which notation identifies an element that is matched with the corresponding number of protons in each of its atoms?
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This note was uploaded on 01/01/2012 for the course CHEM 101 taught by Professor Donahue during the Spring '11 term at Long Island U..

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Atoms, Formulas, Reactions - Unit 2: Atoms, Formulas and...

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