Download Exit Slip: Atomic Theory Review

Name: Date: Block: Exit Slip: Atomic Theory Review 1. Explain how an atom, an element, and a compound are different from each other. An atom is the smallest particle of matter that still retains its properties. An element is a pure substance made up of all the same atoms A compound is a pure substance made up of 2 or more elements bonded in a specific ratio. 2. What are the electrical properties of the following particles? a. protons positive b. neutrons neutral c. electrons negative 3. Where is each particle located in an atom? a. protons in the nucleus b. neutrons in the nucleus c. electrons orbiting around the nucleus 4. What does “atomic number” mean? How is it related to protons and electrons in an element? Each element is defined by the number of protons in the nucleus which is indicated by the atomic number. In a neutral atom, the atomic number also tells us the number of electrons. 5. What is the difference between a chemical family and a period in the periodic table? Chemical families, also know as groups, are the vertical columns of the periodic table. The number of the group also tells us how many valence electrons an element has. Periods are the rows of the periodic table and the Period number tells us how many orbits are found in the Bohr diagrams of that element. 6. List the name and group number of four families of elements. 1. Alkali Metals 2.Alkaline Earth Metals 17. Halogens 18. Noble Gases 7. How does an atom become an ion? By gaining or losing electrons. This imbalances the number of positive protons and negative electrons resulting in an overall charge. Science 10 Ms. Culp Name: Date: Block: 8. How do metals become positive ions? How do non‐metals become negative ions? Metals become positive ions (cations) by donating electrons. Non metals become negative ions (anions) by accepting electrons. 9. Where are valence electrons found? In the outermost shell, also know as the valence shell. 10. How many electrons can be in each of the first three shells in a Bohr model of an atom? Shell 1: _____2__________ Shell 2: ________8________ Shell 3: ________8_________ 11. Draw a Bohr diagram showing the number of protons and electrons in an atom of: (a) carbon (b) chlorine (c) aluminum These were drawn on the board in class. 12. Draw a Bohr diagram showing the number of protons and electrons in each of the following ions. (a) F– (b) Na+ (c) Al3+ These were drawn on the board in class. Science 10 Ms. Culp