Chemistry I Honors 2024-25 Examination #3 Practice Exam PDF

“Practice Makes Perfect Chemistry I Honors 2024-25 Examination #3 Practice Examination/Study Guide Thursday, November 14, 2024 Calculators are permitted and will be provided. Periodic table and polyatom...

“Practice Makes Perfect Chemistry I Honors 2024-25 Examination #3 Practice Examination/Study Guide Thursday, November 14, 2024 Calculators are permitted and will be provided. Periodic table and polyatomic ion chart will be provided for this examination. No notes or cheat sheets. No unauthorized electronic devices including, but not limited to, cell phones, ipads, tablets, smart watches, headphones, airpods or laptops. No Kidding! Read the agreement and sign below before you begin. Good luck! Mr. Barrow I hereby confirm that I will not/did not cheat, as defined on the syllabus, on this examination and am aware of penalties for such violations. Printed Name: ______________________________ Student ID # ________________________________ Signature: __________________________________ 1 Note to Student: - Questions 1 – 4 are practice style exam questions. Students are encouraged to practice more using different atoms/molecules. 2 1. A scientist working in a laboratory, decided to work with the element magnesium. The magnesium atoms used in the lab has an atomic mass of 26 AND a charge of +2. a. What is the atomic number of the magnesium atoms? {2 points} b. How many protons does each magnesium atom have? {2 points} c. How many neutrons does each magnesium atom have? {2 points} d. How many electrons are spinning around the magnesium atoms that are being used in the scientist’s laboratory? {2 points} e. What type of ion is the magnesium atoms being used in the lab are? {2 points} 3 2. A scientist working in a laboratory, decided to work with the element cobalt. The cobalt atoms used in the lab has an atomic mass of 56 AND a charge of -1. a. What is the atomic number of the cobalt atoms? {2 points} b. How many protons does each cobalt atom have? {2 points} c. How many neutrons does each cobalt atom have? {2 points} d. How many electrons are spinning around the cobalt atoms that are being used in the scientist’s laboratory? {2 points} e. What type of ion is the cobalt atoms being used in the lab are? {2 points} 4 3. Complete the electron configuration, Bohr model and Lewis Dot structure for the following atoms. Indicate the number of valence electrons, the number of pairs and lone pairs in the valence shell for each atom. {60 points} a. Mg+2 b. B c. As 5 4. Complete the Kekule structures for the following molecules. Indicate the chemical bonds located within each molecule. {32 points} a. NH3 b. ONCl c. C3H3NO {Please do not complete until the configuration of carbon has been completed in class.} d. C2Cl3O2- {Please do not complete until the configuration of carbon has been completed in class.} 6 Note to Student: - The questions after this page are study guide-based questions. Students will not receive ALL of questions that follow but should know how to answer them in the event a few of them pop up on the exam. 7 5. Introduction to the Periodic Table. Please answer the questions below. a. Describe the relationship between atoms and elements. {8 points} b. Describe the contributions of Dmitri Mendeleev and Henry Mosley to the periodic table. {8 points} c. What does IUPAC represent and what year was the system implemented? {8 points} 8 6. Properties of groups on the periodic table. Please answer the questions below. a. List and describe four properties of metals? {16 points} b. List and describe four properties of non-metals? {16 points} 9 7. Trends of the Periodic Table. Please answer the questions below. a. Where on the periodic table should one find atoms that are smallest in size? {4 points} b. Where on the periodic table should one find atoms that are largest in size? {4 points} c. Where on the periodic table should one find atoms that have a high ionization energy? {4 points} d. Where on the periodic table should one find atoms that have a low ionization energy? {4 points} 10 8. Electronegativity. Please answer the questions below. a. Where on the periodic table should a scientist find atoms that have a high electronegativity? {4 points} b. Where on the periodic table should a scientist find atoms that have a low electronegativity? {4 points} c. Which four atoms have the lowest electronegativity? {8 points} 11 9. Chemical Bonds & Electronegativity. Please answer the questions provided below. a. List and describe the five types of chemical bonds. {20 points} b. How does one determine, using electronegativities, the type of chemical bond that is produced between two atoms? List the range in electronegativites for the different types of chemical bonds. {16 points} 12