This quiz works best with JavaScript enabled. Home > Science > Chemistry > Chemistry – Quiz 39 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Chemistry Quiz 39 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which of these would be a positive ion? A) An atom with 6 protons and 5 electrons. B) An atom with 5 protons and 6 electrons. C) An atom with 5 protons and 5 electrons. D) An atom with 6 protons and 6 electrons. Show Answer Correct Answer: A) An atom with 6 protons and 5 electrons. 2. Which metal was first use by man? A) Aluminium. B) Gold. C) Iron. D) Brass. Show Answer Correct Answer: A) Aluminium. 3. What is a valence? A) The outer electron cloud of an atom. B) A subatomic particle. C) The total amount of matter in something. D) A material that cannot be split into simpler materials; each element is made of only one kind of atom. Show Answer Correct Answer: A) The outer electron cloud of an atom. 4. If an element has 3 valence electrons, what charge will likely form on its ion? A) +3. B) +5. C) -3. D) -5. Show Answer Correct Answer: A) +3. 5. Which of the following is a example of extensive property? A) Color. B) Density. C) Temperature. D) Weight. Show Answer Correct Answer: D) Weight. 6. How do you neutralize a strong acid? A) A strong base. B) A weak base. C) Water. D) A weak acid. Show Answer Correct Answer: A) A strong base. 7. Mole of copper (Cu) is equal to how many atoms? A) 8.03 x 1023 atoms. B) 6.02 x 1023 atoms. C) 4.51 x 1023 atoms. D) 3.11 x 1023 atoms. Show Answer Correct Answer: C) 4.51 x 1023 atoms. 8. An element's molar mass can be found on what part of an element's entry on the periodic table? A) Atomic number. B) Atomic mass. C) Group number. D) It can't be found on the periodic table. Show Answer Correct Answer: B) Atomic mass. 9. Intracellular fluid is the name for water found in A) Tissues spaces. B) Arteries and veins. C) Cells. D) Lymph vessels. Show Answer Correct Answer: C) Cells. 10. How many atoms are there in chemical formula (H2SO4)? A) 6. B) 7. C) 5. D) 3. Show Answer Correct Answer: B) 7. 11. The small number that is written below the symbol and shows how many atoms of each element is present. A) Compound. B) Coefficient. C) Molecule. D) Subscript. Show Answer Correct Answer: D) Subscript. 12. The calculations of quantities in a chemical reaction A) Stoichiometry. B) Dimensional analysis. C) Lewis Structures. D) Balanced Chemical equations. Show Answer Correct Answer: A) Stoichiometry. 13. Who defined "element" as the simplest composition of matter that cannot be broken down further by any chemical means? A) John Dalton. B) Joseph Priestly. C) Robert Boyle. D) Antoine-Laurent Lavoisier. Show Answer Correct Answer: C) Robert Boyle. 14. Which of the following is not a job of a protein A) Act as hormones and enzymes. B) Do much of the work in cells and transport materials. C) Build tissues and muscles. D) Store and transmit genetic information. Show Answer Correct Answer: D) Store and transmit genetic information. 15. Indicates the relative number of moles of each reactant and product in a chemical reaction A) Atoms. B) Avogadro's #. C) Elements. D) Coefficients. Show Answer Correct Answer: D) Coefficients. 16. What charge does an atom have when it GAINS electrons? A) Positive. B) Negative. C) Neutral. D) None of above. Show Answer Correct Answer: B) Negative. 17. What type of charge does a proton have? A) Positive. B) Negative. C) Neutral. D) None of above. Show Answer Correct Answer: A) Positive. 18. Bond where electrons are shared unequally A) Ionic. B) Non-polar covalent. C) Polar covalent. D) Hydrogen. Show Answer Correct Answer: C) Polar covalent. 19. The electrons in the outermost energy level of an atom are called A) Leveling electrons. B) Energy electrons. C) Bonding electrons. D) Valence electrons. Show Answer Correct Answer: D) Valence electrons. 20. The elements:C H O N typically represent what proportion of an organism's element make up? A) 78%. B) 68%. C) 96%. D) 82%. Show Answer Correct Answer: C) 96%. ← 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