This quiz works best with JavaScript enabled. Home > Science > Chemistry > Chemistry – Quiz 15 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Chemistry Quiz 15 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Electrons have a ..... charge. A) Negative. B) Positive. C) Neutral. D) None of above. Show Answer Correct Answer: A) Negative. 2. What is the smallest unit of an element that still retains its properties? A) Atom. B) Nucleus. C) Proton. D) Electron. Show Answer Correct Answer: A) Atom. 3. An aluminum isotope consists of 13 protons, 13 electrons, and 14 neutrons. Its mass number is A) 13. B) 14. C) 27. D) 40. Show Answer Correct Answer: C) 27. 4. "Like dissolves like" refers to compounds with A) No intermolecular attractions. B) The same types of intermolecular forces. C) Similar molar masses. D) The same number of carbon atoms. Show Answer Correct Answer: B) The same types of intermolecular forces. 5. Is a phenomenon observed in diapered colloid particles once light is directed to such mixtures A) Suspension. B) Colloid. C) Tyndall effect. D) Solution. Show Answer Correct Answer: C) Tyndall effect. 6. If an aluminum atom has 13 protons (+) and 10 electrons (-), what is it's charge? A) Al3+. B) Al13+. C) Al10+. D) Al10-. Show Answer Correct Answer: A) Al3+. 7. What is the number of protons in iron-56? A) 26. B) 30. C) 56. D) 82. Show Answer Correct Answer: A) 26. 8. Suppose you have two white powders (Baking powder and baking soda) an you want to distinguish the two. How would you identify the given materials without tasting them? A) Get their masses. B) Place them in water then observe. C) Touch them one by one. D) None of the above. Show Answer Correct Answer: B) Place them in water then observe. 9. The property of water that shows it takes a lot of energy to raise water 1 degree. This helps stabilize the environment and organisms and cells that are made mostly of water. A) High Specific Heat. B) Adhesion. C) Cohesion. D) Ice Floating on Top of Water. Show Answer Correct Answer: A) High Specific Heat. 10. Chemical bonds formed by the sharing of electrons are called A) Ionic. B) Covalent. C) Hydrogen. D) Isotopic. Show Answer Correct Answer: B) Covalent. 11. The tendency of a substance to resist changes in its motion is A) Composition. B) Inertia. C) Density. D) None of above. Show Answer Correct Answer: B) Inertia. 12. How many atoms of fluorine are in a molecule of carbon tetrafluoride, CF4? A) 1. B) 2. C) 4. D) 5. Show Answer Correct Answer: C) 4. 13. A way to show the number and type of elements(atoms) in a molecule or compound with a combination of symbols and numbers. A) Formula. B) Symbol. C) Chemical formula. D) Molecules. Show Answer Correct Answer: C) Chemical formula. 14. What is the chemical symbol for carbon? A) C. B) Ca. C) Cn. D) Crn. Show Answer Correct Answer: A) C. 15. The isotope atoms differ in? A) Atomic weight. B) Atomic number. C) Number of electrons. D) Number of neutrons. Show Answer Correct Answer: D) Number of neutrons. 16. Which of the following bonds are the weakest? A) Ionic. B) Hydrogen. C) Electrovalent. D) Covalent. Show Answer Correct Answer: B) Hydrogen. 17. A pH of 3 is ..... times more acidic than a pH of 6 A) 2X. B) 10X. C) 1000X. D) 5X. Show Answer Correct Answer: C) 1000X. 18. Ionic compound contains? A) Non-metals. B) Metals. C) Both. D) None of above. Show Answer Correct Answer: C) Both. 19. An ion is formed when an atom gains or loses A) Electrons. B) Protons. C) Bonds. D) Neutrons. Show Answer Correct Answer: A) Electrons. 20. Atomic number of an element gives A) The number of nucleons in its atom. B) The number of electrons in its atom. C) The weight of the atom of the element. D) The total number of elementary particles in its atom. Show Answer Correct Answer: B) The number of electrons in its atom. ← PreviousNext →Related QuizzesScience QuizzesChemistry Quiz 1Chemistry Quiz 2Chemistry Quiz 3Chemistry Quiz 4Chemistry Quiz 5Chemistry Quiz 6Chemistry Quiz 7Chemistry Quiz 8Chemistry Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books