PPT-Using the Periodic Table to Find Valence Electrons

What is a valence electron The electrons in the last shell or energy level These determine how an atom behaves reactivity bonding These are the only electrons we need to worry about from now on. 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. The . Periodic Table . Traditionally, early Greeks considered that there were four classical elements: earth, air, fire, and water.. Some Early Ideas About Elements. Later, around 1667, it was thought there was the existence of, in addition to the classical four elements of the Greeks, an additional fire-like element called “. Review. Electrons are the negatively charged part of the atom. Electrons are found in . orbitals. around the nucleus. We write the electron configuration of the element to see the different . orbitals. The most awesome chemistry tool ever!. Unit Objectives:. Understand the history of who built up the periodic table, how they did it, and what law was made. Become familiar with structure of periodic table, how the e. 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 . By 1869, there were 63 known elements. Mendeleev organized elements by atomic mass and chemical reactivity. Created the first widely accepted periodic table. Mendeleev Continued. Mendeleev found patterns by arranging cards with names, masses, and other physical and chemical properties of elements. 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.. 2. Electron Configuration. An . “electron configuration”. of an atom is a particular distribution of electrons among available subshells. . The . notation for a configuration lists the . subshell . Subatomic Particles. Electrical Charge. Location. Size. Protons. Positive. Nucleus. Large mass . Electrons. Negative. Cloud. (outside). Small mass . (almost no mass). Valence. electrons. Negative. Very outside . Section 1. Development of the Modern Periodic Table. The periodic table evolved over time as scientists discovered more useful ways to compare and organize the elements.. Section 1: . Development of the Modern Periodic Table. 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?. The Periodic Table Ms. Pici 2016-2017 The Periodic Table Lay out 2-28-16 Take out periodic table basics and white paper You will need scissors, a glue stick, and colored pencils Use an Analogy Calendar like the Periodic Table The Periodic Table got its name because of the repeating pattern of chemical & physical . properties. .. Mendeleev ordered his periodic table with elements arranged in order of increasing atomic . Section 6.1. . Development of the Modern Periodic Table. Section 6.2. . Classification of the Elements. Section 6.3. . Periodic Trends. Exit. Click a hyperlink or folder tab to view the corresponding slides..