PPT-Valence Electrons

Activity Fold your periodic table so that the f and d blocks are looped Determine the number of valence electrons for each remaining group column Find the pattern Valence Electrons Valence electrons. Each element has a unique atomic number. The atomic number is equal to the number of protons in the nucleus of each atom of that element.. No two elements have the same number of protons in their atoms, so this number identifies an element. For example, silver atoms have 47 protons. Silver’s atomic number is 47. No other element has the atomic number 47.. Table. Dmitri. . Mendeleev. . organized the known elements into a table called the periodic table.. He organized them by their increasing atomic masses.. Today we organize the. . elements. . by their increasing. How they are formed. Valence Electrons. Valence Electrons of an atom are the electrons that are in the outermost s and p sub shells. (ONLY S AND P). To determine how many electrons are in your valence shell, look at where your element is on the periodic table.. Valence Electrons. Chemistry - Shearer - Standard 1. 1. Students . know how to use the periodic table to determine the number of electrons available for bonding. . Why are Valence Electrons Important?. C. l. ). Draw the Bohr model. Draw the orbital Diagram. Write the longhand notation. Write the shorthand notation. Bellringer. Bellringer. Bohr Model. Longhand. 1s. 2. 2s. 2. 2p. 6. 3s. 2. 3p. 5. Valence Electron Interaction and Charges. The Role of Electrons in Bonding. The sharing or transfer of . electrons . is what holds atoms together . in a . compound. Typically, only the electrons in the . Rule Breakers . . Some molecules disobey octet rule. C, N, O, and F are mostly rule keepers. 1) Odd Number of Valence Electrons. 2) Incomplete Octets. 3) Expanded Valence Shells . Molecular Exceptions to the Octet Rule. What is a Valence Electron?. Valence electrons. are the electrons in the outer shell . that bond with other atoms. What is a Valence Electron?. Valence electrons. are the electrons in the outer shell . Christopherson. Missing alien. Aliens. . Introduction to . Periodicity. Your Mission. NASA has recently found life on a nearby planet!. These aliens have many similarities and differences and NASA is in need of a way to organize these life forms.. DO NOW. Pick . up your paperwork. Pick up two handouts. Get out Electron Configuration Notes, your Blank Periodic Table, and your green periodic table.. RULES. Aufbau. Principle. Each electron occupies the lowest energy orbital available. Electrons are added from the ground state up. Electrons fill in increasing energy order.. Chemical Reactivity. The reactivity of an element depends on the number of . valence electrons. .. If . the outer shell . of an atom already . contains . 8 valence electrons. , this means . the atom has . th. , 2018. Pre-Class:. Get your periodic table. Tell me some patterns you see. . They can be obvious…. Places to Look. : Atomic number, atomic mass. Things to Guess. : Atomic “size,” nuclear charge, location of metals, gases, liquids?. Do . Now: Identify . Bond Type from Formula. Au. Ag. CO. 2. Li. 3. N. Na. 2. S. Mg. CsF. H. 2. O. NaCl. SO. 2. Cu. CH. 4. Covalent. Covalent. Covalent. Covalent. Ionic. Ionic. Ionic. Ionic. Metallic. Semiconductors and their properties. Materials used for electronic components . . Like resistors. Like capacitors. Like diodes. Like transistors. Like inductors. Semiconductor materials. Conductivity lies between conductor and insulator.