Chemistry Review Time Name: ___________________________ Period: ______ Date: ________________ 1. What happens to the atomic number as you move from left to right across a period on the periodic table? A. it decreases B. it stays the same as the weighted average C. it increases D. it equals the mass number 3. What are the majority of elements on the periodic table classified as? A. gases B. metals C. nonmetals D. metalloids 2. What did Thomson’s gas tube experiment reveal about atoms? A. Atoms could not be divided into smaller pieces B. Atoms contain a “cloud” of electrons C. Atoms are made of even smaller particles D. Atoms are composed of elements 4. Which scientist learned that electrons move in fixed orbits? A. Dalton B. Bohr C. Thomson D. Rutherford 5. Which physical property refers to a liquid’s resistance to flow? A. density B. viscosity C. conductivity D. malleability 6. An atom has 14 protons. How many electrons does it have? A. 2 C. 14 B. 7 D Which particle surrounds the nucleus? A. electrons C. neutrons B. protons D. leptons 8. Which of the following statements about isotopes of an element are true? A. They have different number of electrons B. They have the same mass number but different atomic number C. They have the same number of neutrons. D. They have the same atomic number but different mass number. 9. What is the group name given to elements in group 1A? A. alkaline earth metals C. halogens B. alkali metals D. transitional metals

10.During which phase change does a gas changes to a liquid? A. vaporization C. sublimation B. condensation D. deposition 13. What is the atomic mass of an element bases on? A. the atomic mass of the most common isotope of the element B. the reactivity of the element C. one mass number of the element D. the masses and distribution of the element’s isotopes 17. A chemical reaction that releases energy to its surroundings is a … A. reactant reaction B. endothermic reaction C. balanced reaction D. exothermic reaction 11. What can you tell about an atom of iron that has an atomic number of 26 and a mass number of 53? A. The atom has 26 neutrons B. The atom has 27 electrons C. The atom has the same number of protons and neutrons D. The atom has 27 neutrons 12. Why do elements in the same group have similar properties? A. They have the same number of isotopes B. They have the same atomic number C. They have the same mass number D. They have the same number of valence electrons 14. What are transferred to form an ionic bond? A. anions C. electrons B. ions D. protons 15. Which type of chemical bond is formed when two atoms share a pair of valence electrons? A. ionic C. atomic B. covalent D. crystal 16. In a chemical reaction, mass is.. A. only created B. only destroyed C. both created and destroyed D. neither created nor destroyed 18. On the pH scale, the number 14 would describe a solution that is… A. strong base C. neutral B. weak acid D. strong acid 19. An alpha particle is made up of.. A. two protons B. two neutrons C. one proton and one neutron D. two protons and two neutrons 20. Which term refers to splitting an atomic nucleus into two smaller parts? A. radioactivity C. fusion B. half-life D. fission

21. Which of the following is an anion? A. potassium ion C. sodium ion B. calcium ion D. chloride ion 24. Which of the following is a balanced chemical equation? A. AgNO 3 + NaCl  4AgCl + 2NaNO 3 B. AgNO 3 + NaCl  4AgCl + NaNO 3 C. 2AgNO 3 + 2NaCl  3AgCl + 2NaNO 3 D. AgNO 3 + 2NaCl  AgCl + 3NaNO What type of reaction is shown in the chemical equation NH 4 Cl  NH 3 + HCl A. synthesis B. decompostion C. single replacement D. double replacement 23. Increasing the surface area of a solid… A. slows the rate of dissolving B. speeds up the rate of dissolving C. has no effect on the rate of dissolving D. causes the solid to ionize 25. A substance that does not conduct an electric current when it forms a solution is a(n)… A. electrolyte C. polar substance B. nonelectrolyte D. salt 27. Which of the following equation s balanced? A. Cu + O 2  CuO B. 2Cu + O 2  2CuO C. Cu + O 2  2CuO D. 2Cu + 2O 2  CuO 26. Which symbol represents a coefficient? A.  C. 2 B. + D. O 2 Explain the following 28. Each model of the atom 29. Number of protons, neutrons and electrons in Ca, K, Ne, and O. 30. Identify where metals, nonmetals and metalloids are on the periodic table. 32. Write the formula for the following A. sodium nitride B. potassium nitrate C. zinc (II) chloride 33. Which the name for the following A. Li 2 O B. NaOH