Homework 2

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SUNY Canton *

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Course

107

Subject

Chemistry

Date

Feb 20, 2024

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pdf

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14

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. lia Narri Student Information 1220 Cofteen St IL! Jl“ yirrlgirl eSS wiy]CC - St ' i ¥} udent I Learning Online Watertown, NY 13601 I Courses I Community 2022 Spring ONLIB_CHE_107_1 (CHE_107_E1) - Intro to Chemistry 1 Homework Review Test Submission: Homework#2 Review Test Submission: Homework#2 User Julia Michelle Narrigan Course 2022_Spring_ONLIB_CHE_107_1 (CHE_107_E1) - Intro to Chemistry 1 Test Homework#2 Started 2/23/22 9:11 PM Submitted 2/23/22 9:44 PM Due Date 2/23/22 11:59 PM Status Completed Attempt Score 8 out of 10 points Time Elapsed 33 minutes Results Displayed All Answers, Submitted Answers, Correct Answers, Incorrectly Answered Questions Question 1 0.25 out of 0.25 points - Which Greek philosopher thought that matter was infinitely divisible? v Selected Answer: @ d. Zeno Answers: a. Aristotle b. Democritus c. Plato @ d. Zeno Question 2 0.25 out of 0.25 points How many elements occur naturally as diatomic molecules? | Selected Answer: @ d. 7
Answers: a.0 Question 3 0 out of 0.25 points Which of the following laws enables us to characterize a compound by a specific chemical formula? Selected Answer: ¢ p, the law of conservation of mass Answers: a. the law of conservation of energy p. the law of conservation of mass @ c the law of constant composition d. all of these Question 4 0.25 out of 0.25 points What is the mass number of an atom that is made up of 38 protons, 49 neutrons, and 38 electrons? v Selected Answer: «, ¢ 87 Answers: a. 38 b. 49 Question 5 0.25 out of 0.25 points What are the horizontal rows of the periodic table called? Selected Answer: &, p, periods Answers: a. cycles @ b. periods
C. families d. none of these Question 6 0.25 out of 0.25 points Which of the following contains two species which are a pair of isotopes? Selected Answer: b, 12C and 13C Answers; a 14C and 14N o b, ?Cand c both 14¢ and 14y and 12¢ and 13¢ d neither 14¢ and 14y or 12¢ and 13¢ Question 7 0.25 out of 0.25 points - Which of the following contains only nonmetals? v Selected Answer: &, ¢ F, Cl,He,and C Answers: a. C, Si, B, and Be b. P, B, Si, and Na @ c F, Cl, He, and C d. none of these Question 8 0.25 out of 0.25 points Which of the following best compares Democritus’s view of matter and our current view? Selected Answer: @ c The ancient view is based on thought only, but the current view is based on experimental evidence. Answers: a. Both views are based on belief only. b, Both views are based on firm experimental evidence. @, c. The ancient view is based on thought only, but the current view is based on experimental evidence.
d. Both views are based on a combination of thought and experimental evidence. Question 9 Which element is currently used to define the atomic mass unit? Selected Answer: &, | carbon-12 Answers: a. hydrogen-1 @ b, carbon-12 c. Oxygen-16 d. none of these Question 10 Which of the following subatomic particles are found in the nucleus? Selected Answer: @ d. protons and neutrons Answers: a. clectrons p. neutrons ¢. protons @ d. protons and neutrons Question 11 How many elements are there in period 3? Selected Answer: @ c 8 Answers: a. 2 0.25 out of 0.25 points 0.25 out of 0.25 points 0.25 out of 0.25 points
Question 12 0.25 out of 0.25 points Which of the following defines the mass number of an atom? Selected Answer: &, , the total number of protons and neutrons in the atom Answers: a. the number of protons in the atom b, the number of neutrons in the atom @, c. the total number of protons and neutrons in the atom d. the total number of protons, neutrons, and electrons in the atom Question 13 0 out of 0.25 points Which column of the periodic table contains the halogens? X Selected Answer: Q d. 8A Answers: a. 1A b. 4A o C. 7A d.8A Question 14 0.25 out of 0.25 points Which of the following is true of the atomic weight of an element? Selected Answer: @ d. It is a weighted average obtained from the weights and abundances of the isotopes. Answers: a. It is the weight of the heaviest isotope. b, It is the weight of the lightest isotope. c. It is the weight of the most abundant isotope. @ d. It is a weighted average obtained from the weights and abundances of the isotopes. Question 15 0.25 out of 0.25 points Which of the following statements describes a compound?
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