1. 8 th Grade Science February 25, 2014 Do Now Complete on a sticky note: Valence electrons are the electrons found… They are important because…

2. 8 th Grade Science Today’s Schedule 1. Do-Now 2.Compare and Contrast Elements 3.Element Bingo 4.Conclusion Questions Dark Matter Objectives: Today we will… 8.5 (A) describe the structure of atoms, including the masses, electrical charges, and locations, of protons and neutrons in the nucleus and electrons in the electron cloud 8.5(B) identify that protons determine an element's identity and valence electrons determine its chemical properties, including reactivity

3. 8 th Grade Science Sodium Aluminum Atomic #group# energy levels Proton ## valence electronsperiod Electron #reactivity Neutron #metal, nonmetal, or metalloid Atomis mass Compare and Contrast Elements Work with your shoulder partner to complete the following:

4. 8 th Grade Science Sodium Atomic number =11 11 protons 11 electrons 12 neutrons Atomic mass=22.99 amu 1 st group 1 valence electron Very reactive metal in 3 rd period. Aluminum Atomic number =13 13 protons 13 electrons 14 neutrons Atomic mass = 26.982 amu 13 th group 3 valence electrons Least reactive metal in 3 rd period. Atomic #group# energy levels Proton ## valence electronsperiod Electron #reactivity Neutron #metal, nonmetal, or metalloid Atomis mass Metals 3 rd period 3 energy levels Compare and Contrast Elements

5. 8 th Grade Science Fill in your Bingo card with element names from the left. In a random order. Element Bingo

6. 8 th Grade Science 1.Students will work in groups of 4. 2. The group will decide who will be in charge of the bingo call list. They will keep track of which cards are called. 3.Stack the Bingo cards face down in the center of the table. 4. The person at the red seat will begin by reading the top Bingo card to the group. 5. The group will use their Periodic Table to answer the question. 6. Each student will mark their answer on their Bingo card. 7. The first person in the group to get 4 in a row wins. Element Bingo

7. 8 th Grade Science Questions after Element Bingo Answer these in your notebook using complete, reflective sentences. 1.How are groups and periods helpful in locating an element on the Periodic Table? 2.What information is needed to identify an element? 3.How does the reactivity of a metal differ from nonmetals? 4.Where are the most reactive metals located on the Periodic table? 5.What determines the reactivity of a metal? 6.Where on the Periodic Table are the most reactive nonmetals located? Element Bingo

8. 8 th Grade Science Today’s Schedule 1. Do-Now 2.Compare and Contrast Elements 3.Element Bingo 4.Conclusion Questions Dark Matter Objectives: Today we will… 8.5 (A) describe the structure of atoms, including the masses, electrical charges, and locations, of protons and neutrons in the nucleus and electrons in the electron cloud 8.5(B) identify that protons determine an element's identity and valence electrons determine its chemical properties, including reactivity