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Name ______________________________________ Date __________________ Class Period _________ Atoms, Elements, and Compound Test Study Guide I. Fill in the blank with the correct word. ( molecule, equation, compound, element, subscript, coefficient, formula) 1. A pure substance made of only 1 type of atom is called element. 2. When 2 or more elements are combine to form a new substance is a compound . 3. A formula is used to represent a compound. 4. Equations are used to show a chemical change or reaction needed to make a compound. 5. The small number to the right of an element symbol that tells the number of atoms is called a subscript. 6. The large number to the left of the element symbol that tells the number of molecules is called a coefficient. 7. A molecule is the smallest piece of a compound. II. Short Answer. 8. In an equation/formula what does a subscript tell you? A subscript tells you the number of atoms. 9. In an equation what does a coefficient tell you? A coefficient tells you the number of molecules. 10. Draw a molecule of water below. 11. Label each example below as compound (C) or element (E). Then write the name of each element and how many atoms of each a. C_CO2 carbon 1, oxygen 2 e. C CaCo2 calcium 1, cobalt 2 b. f. E Al aluminum__________ E Fe c. iron C H20 hydrogen 2, oxygen 1 d. C HCl hydrogen 1, chlorine 1 g. E O2 ___oxygen 2_________________ h. C AlCl3 alumininum 1, chlorine 3____ 12. Label the atom model below. Use the following: proton, electron, neutron, nucleus, k shell, L shell, M shell, 2, 8, 18. M shell 18 L shell 8 K shell 2 Proton + 0 Neutron Nucleus Electron 13. Label the periodic table box below. Use the following: atomic number, element symbol, element name, atomic mass, protons and electrons, protons PLUS neutron. 5 Atomic number protons and electrons B Element symbol Boron Element name 10.811 Atomic mass protons PLUS neutrons Subatomic Particle 14. Proton 15.Neutron 16. Electron Location Nucleus Nucleus Outside nucleus Charge Positive + Neutral 0 Negative - Matching: Using the word box below, write the letter of the correct vocabulary word for each definition. 17) M The 3 smaller pieces found inside an atom. 18) 19) 20) K The building block of matter/smallest part of matter. L Pure substances made of only one type of atom. I The heavy center of the atom. 21) J Energy levels around the nucleus where electrons are moving. 22) D holds 2 electrons 23) FThe positive subatomic particle found in the nucleus. 24) N holds 8 electrons. 25) H The negative subatomic particle found outside the nucleus. 26) _G holds 18 electrons. 27) B Number that tells the number of protons PLUS neutrons. 28) C Letter(s) that chemically represent each element 29) A Number that tells the number of protons and electrons. A. Atomic number B. Atomic mass C. Element symbol D. K shell E. Neutron F. Proton G. M shell H. Electron I. Nucleus J. Shells K. Atom L. Element M. Subatomic particles N. L shell Use the chart above to answer the following questions. 30. Which element has more protons – Al or Li? Al – number 13 31. What would be the correct way to write the element symbol for aluminum # 13-AL or Al? Why? Al because the 2nd letter should be lower case to show it is all the same element. 32. What subatomic particle determines the type of element? Protons 32. How many neutrons does Sodium (Na) have? Show your math. 23 – 11 = 12 neutrons. 33. If an element loses an electron does it become a new element? No it stays the same element.