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Worksheet 3: Atoms, Elements, and the Periodic Table Before gathering in groups take a moment to reflect on what you have been learning. Are there any questions you still have about problem solving conversion factors, significant figures, and atomic structure? If yes, let a TA know and we can talk about it in class. 1. Label the attached periodic table with some additional information that may be useful while studying: Group numbers, period numbers, metals, transition metals, non-metals, etc 2. Quiz your partner: give them a location of an element on the periodic table and ask them to tell you the ymbol, the atomic number, and if it is a metal or nonmetal For example: "What element is in group 4, period 47 Answer: Ti (titanium), 2 - 22, metal 3. As a group, define each of the following terms element, atomic number, atomic mass, mass number, ion Sketch a picture of a Helium atom (assume your atom is spherical) below. Clearly label your sketch. The nuclear symbol for He is shown below 4. Circle any of the following that are isotopes of helium-4. Explain your choices in 1-2 sentences. He He He NE e N