5-1: Atoms, Bonding, and the Periodic Table What does the periodic table tell you about the atoms of an element?

Why do you organize your playlist by genre? Anticipatory Set Why do you organize your playlist by genre?

California Standards Science Standard 8.3.f: Students know how to use the periodic table to identify elements in simple compounds.

Input valence electron: the electrons that have the highest energy level and are held most loosely. electron dot diagram: includes the symbol for the element surrounded by dots; each dot stands for one valence electron. chemical bond: the force of attraction that holds two atoms together as a result of the rearrangement of electrons between them.

Input Valence Electrons and Bonding The number of valence electrons in an atom of an element determines the ways in which the atom can bond with other atoms. Valence electrons… Electrons in the outermost shell of an atom. Have the highest energy level. Involved in bonding between atoms.

Input & Modeling Valence Electrons and Bonding Electron Dot Diagrams include the symbol for an element surrounded by dots that represent the number of valence electrons.

Input & Modeling Valence Electrons and Bonding Chemical Bond The force of attraction that holds two atoms together as a result of the rearrangement of electrons between them. Electrons may be transferred from one atom to another, or they may be shared between the atoms. The Rule of 8 Atoms are unlikely to react when they have 8 valence electrons.

Input & Modeling How the Periodic Table Works What does the periodic table tell you about the atoms of the elements? The periodic table reveals the underlying atomic structure of atoms, including the arrangement of the electrons.

Input & Modeling How the Periodic Table Works The number of valence electrons varies by group. Group 1 elements have 1 valence electron. Group 2 elements have 2 valence electrons. Groups 3 – 12 have 1 to 2 valence electrons. Group 13 elements have 3 valence electrons. Groups 14 – 18 have 4, 5, 6, 7, and 8 valence electrons, respectively. Group 3 through 12 elements do not follow the same pattern as the other groups!

Example of Group 1 elements Lithium Atom: 3 Protons/3 Neutrons 3 Electrons – 1 in Valence Shell Sodium Atom: 11 Protons/11 Neutrons 11 Electrons – 1 in Valence Shell

Check for Understanding What information does an electron dot diagram show? # of valence electrons How are atoms of the elements in Group 1 similar? The each have one valence electron.

Guided Practice Independent Practice Answer #1-5 Finish the worksheet. 7 5 yes, needs 3 nonmetal

HOMEWORK EXTENSION Write a detailed SUMMARY of the section and complete the UNANSWERED QUESTIONS section of your notes. Choose two of the remaining Depth & Complexity ICONS in your notes and explain how they relate to this section.