CHEM 135 - Exam 1 Review Questions
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Questions and Answers

What is the number of neutrons in one atom of fluorine-18?

  • 10
  • 7
  • 8
  • 9 (correct)

    • How many moles of hydrogen atoms are contained in 1.00 g of NH3BH3, given its molecular mass is 30.87 amu?

  • 0.032
  • 0.162 (correct)
  • 0.15
  • 0.5

    • What is the mass in grams of 1 atomic mass unit (amu)?

  • 1.67E-24
  • 1.67E-27
  • 1.66E-24 (correct)
  • 1.66E-23

    • Given a 10.0 g sample contains 4.39×10^22 atoms, what is the element represented?

    <p>Iron</p> Signup and view all the answers

    What is the formula representation for the species with 23 protons, 21 electrons, and 30 neutrons?

    <p>Fe2+</p> Signup and view all the answers

    How many pages are included in the examination document?

    <p>6 pages</p> Signup and view all the answers

    What is the penalty for starting the exam before everyone has one?

    <p>The exam will be voided</p> Signup and view all the answers

    How should students indicate their answers during the exam?

    <p>Only in the space provided</p> Signup and view all the answers

    What should students do when time is called during the exam?

    <p>Put their pencil down and remain in their desk</p> Signup and view all the answers

    What is the maximum number of points that can be earned on Question 6?

    <p>10 points</p> Signup and view all the answers

    What item must be detached by the student during the exam?

    <p>The Periodic Table of the Elements</p> Signup and view all the answers

    What is one of the examination rules regarding the use of scratch paper?

    <p>Scratch paper must be blank pages in the exam</p> Signup and view all the answers

    What must a student do for the honor pledge at the beginning of the exam?

    <p>Write their name and sign</p> Signup and view all the answers

    What is the systematic name for the compound represented by the formula NaClO?

    <p>Sodium hypochlorite</p> Signup and view all the answers

    Which atomic orbital corresponds to the quantum numbers n = 3, l = 0?

    <p>3s</p> Signup and view all the answers

    What is the maximum wavelength in nm that can ionize an atom with an ionization energy of 1402 kJ/mol?

    <p>845 nm</p> Signup and view all the answers

    What designation corresponds to the quantum numbers n = 2, l = 1 with a nodal plane at x = 0?

    <p>2p</p> Signup and view all the answers

    What is the systematic name of aluminum hydrogen sulfate?

    <p>Aluminum bisulfate</p> Signup and view all the answers

    Which of the following atomic orbitals has two nodal planes?

    <p>3d</p> Signup and view all the answers

    How many unpaired electrons are present in the ground state configuration of sulfur (S)?

    <p>2</p> Signup and view all the answers

    What is the full orbital diagram for the Ge2+ ion in its ground state?

    <p>[Ar]4s2 3d10 4p0</p> Signup and view all the answers

    Arrange the following elements in order of increasing atomic radius: Al, Ne, Ca.

    <p>Ne, Al, Ca</p> Signup and view all the answers

    Which of the following ions has the largest ionic radius among I-, Br-, and Rb+?

    <p>I-</p> Signup and view all the answers

    Order the following elements based on their electron affinity from most negative to least negative: Ne, H, F.

    <p>F, H, Ne</p> Signup and view all the answers

    Which of the following has the lowest ionization energy: Li, N, Si?

    <p>Li</p> Signup and view all the answers

    What is the empirical formula of alizarin given its mass percentages: 70.00% C, 3.36% H, and 26.64% O?

    <p>C14H8O4</p> Signup and view all the answers

    Using Planck's constant and the speed of light, which equation relates energy to frequency?

    <p>E = hν</p> Signup and view all the answers

    Identify the correct relationship of the atomic mass formula provided.

    <p>Atomic mass = ∑(isotope abundance × atomic mass) / 100%</p> Signup and view all the answers

    Which transition in a hydrogen atom would result in the emission of the highest energy photon?

    <p>From n=4 to n=1</p> Signup and view all the answers

    Which of the following has the highest atomic number?

    <p>Calcium (Ca)</p> Signup and view all the answers

    What is the most common method to express ionization energy?

    <p>kJ/mol</p> Signup and view all the answers

    Identify the correct relationship between atomic size and period in the periodic table.

    <p>Decreases across a period</p> Signup and view all the answers

    How do electron affinities generally vary in the periodic table?

    <p>Increase across a period</p> Signup and view all the answers

    What type of bond is likely to form between elements that have high ionization energies and high electron affinities?

    <p>Covalent bond</p> Signup and view all the answers

    Which state of hydrogen corresponds to the lowest level of energy?

    <p>n=1</p> Signup and view all the answers

    Which particle is involved in the transition that emits photons in a hydrogen atom?

    <p>Electron</p> Signup and view all the answers

    Study Notes

    Exam Information

    • Exam: CHEM 135 - EXAM 1
    • Instructor: Dr. Vedernikov
    • Exam duration: The exam is administered in a period of time
    • Exam format: 14 questions
    • Exam structure: The exam contains 6 pages
    • Materials allowed: Periodic Table of the Elements
    • Scratch paper permitted
    • Answering: All answers must be in the space provided
    • Examination Rules:
      • Students may not begin until all are ready
      • When time is called, students must stop writing.
      • Students remain in their seats until all exams are collected.
    • Point values vary per question
    • Total points: 100

    Exam Questions

    • Question 1: 6 points
    • Question 2: 6 points
    • Question 3: 8 points
    • Question 4: 6 points
    • Question 5: 6 points
    • Question 6: 10 points
    • Question 7: 10 points
    • Question 8: 6 points
    • Question 9: 6 points
    • Question 10: 6 points
    • Question 11: 8 points
    • Question 12: 6 points
    • Question 13: 8 points
    • Question 14: 8 points

    Additional Information

    • Questions on pages 2-4
    • Physical constants on page 5
    • Periodic Table of the elements on page 6.
    • Questions may require numerical answers, calculation, and showing work.
    • Significant figures and units are important for the correct answers.
    • Pay attention to the number of significant figures when calculating.

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    CHEM 135 Exam 1 PDF

    Description

    Prepare for Dr. Vedernikov's CHEM 135 Exam 1 with this review quiz. It contains 14 questions based on the concepts taught in the course, structured for optimal practice. Use your knowledge of chemistry and the Periodic Table of Elements to succeed.

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