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. Section 1. . - Organizing the Elements. Section 2. . - Exploring the Periodic Table. Section 3. . - Families of Elements. State Standards. CLE 3202.1.3 . Characterize and classify elements based on their atomic structure. 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 “. Michael Bailey & Marlena . Artis. Atomic Mass. Symbol. (Uranium). Atomic Number. The atomic number is the number of protons an atom has. The atomic mass is the atom’s mass often measured in AMUs (Atomic mass units) which weighs approximately 1/12 the mass of a carbon-12 atom. 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. Turn to page 3 in the Unit Note Packet . History of the Periodic Table. In the . mid-1800’s. , . Dimitri Mendeleev published a table of all of the known elements, 70 elements to be exact. . Not until . 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 . Part 1: The Periodic Table . and Physical Properties. Mendeleev’s Periodic Table. Dmitri Mendeleev. Modern Russian Table. Chinese Periodic Table. Stowe Periodic Table. This is Timothy Stowe's physicists’ periodic table. This table depicts periodicity in terms of quantum numbers. . S8P1e. . Develop models by analyzing patterns within the periodic table that illustrate structure, composition and characteristics of atoms.. Copy This! . 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?. Atoms and the Periodic Table Atomic Structure ATOM: the smallest particle that has the properties of an element. From the early Greek concept of the atom to the modern atomic theory, scientists have built on and modified existing models of the atom. 4.2. Main Group Elements A. The main group elements are group A elements: 1-8, and they do not include the transition metals or the rare earth elements (lanthanides and the actinides).. Following the Octet Rule.