University:
Eastern Kentucky University
Course:
CHE 111 | General Chemistry
Academic year:

2021
Views:

372

Pages:

5
Author:

Kevin Riddle

If xenon has an atomic number of 54 and a mass number of 108, how many neutrons does it have? Select one: a. 54 b. 27 c. 100 d. 108 Feedback The correct answer is: 54 Question 2 Correct Mark 1.00 out of 1.00 Flag question Question text Atoms that vary in the number of neutrons found in their nuclei are called __________. Select one: a. ions b. neutrons c. neutral atoms d. isotopes Feedback The correct answer is: isotopes Question 3 Correct Mark 1.00 out of 1.00 Flag question Question text Potassium has an atomic number of 19. What is its electron configuration? Select one: a. shells 1 and 2 are full, and shell 3 has nine electrons b. shells 1, 2 and 3 are full and shell 4 has three electrons c. shells 1, 2 and 3 are full and shell 4 has one electron d. shells 1, 2 and 3 are full and no other electrons are present Feedback The correct answer is: shells 1, 2 and 3 are full and shell 4 has one electron Question 4 Correct Mark 1.00 out of 1.00 Flag question Question text Which type of bond represents a weak chemical bond? Select one: a. hydrogen bond b. atomic bond c. covalent bond d. nonpolar covalent bond Feedback The correct answer is: hydrogen bond Question 5 Correct Mark 1.00 out of 1.00 Flag question Question text Which of the following statements is not true? Select one: a. Water is polar. b. Water stabilizes temperature. c. Water is essential for life. d. Water is the most abundant molecule in the Earth’s atmosphere. Feedback The correct answer is: Water is the most abundant molecule in the Earth’s atmosphere. Question 6 Correct Mark 1.00 out of 1.00 Flag question Question text When acids are added to a solution, the pH should __________. Select one: a. decrease b. increase c. stay the same d. cannot tell without testing Feedback The correct answer is: decrease Question 7 Incorrect Mark 0.00 out of 1.00 Flag question Question text A molecule that binds up excess hydrogen ions in a solution is called a(n) __________. Select one: a. acid b. isotope c. base d. donator Feedback The correct answer is: base Question 8 Correct Mark 1.00 out of 1.00 Flag question Question text Which of the following statements is true? Select one: a. Acids and bases cannot mix together. b. Acids and bases will neutralize each other. c. Acids, but not bases, can change the pH of a solution. d. Acids donate hydroxide ions (OH–); bases donate hydrogen ions (H+). Feedback The correct answer is: Acids and bases will neutralize each other. Question 9 Correct Mark 1.00 out of 1.00 Flag question Question text Each carbon molecule can bond with as many as __________ other atom(s) or molecule(s). Select one: a. one b. two c. six d. four Feedback The correct answer is: four Question 10 Correct Mark 1.00 out of 1.00 Flag question Question text Which of the following is not a functional group that can bond with carbon? Select one: a. sodium b. hydroxyl c. phosphate d. carbonyl Feedback The correct answer is: sodium