PPT-Electron Configuration Electron configurations tells us in which orbitals the electrons

Three rules electrons fill orbitals starting with lowest n and moving upwards The order is 1s 2s 2p 3s 3p 4s 3d 4p 5s 4d etc Orbital Diagram The electron configuration of an atom is a shorthand method of writing the location of electrons by sublevel. Energies in Relation to Periodic Table. 3d. 4f. 1s. 2p. http://www.docstoc.com. Energies of Orbitals. E. Hydrogen. ei. Everything other than Hydrogen. Questions: . What . is the difference between the two? Why do you think hydrogen is different?. Shielding and Penetration. Orbitals with radial probability closer to the nucleus are more . penetrating. . . The closer, more penetrating orbitals, are . shielding. the further orbitals from the nucleus. . Electron Configurations. The way electrons are arranged in atoms. Energy Levels (Principle Quantum Number – n). First energy level. Only s sublevel (1 s orbital). Only 2 electrons. 1s. 2. Second energy level. Quantum Atomic Theory. Heisenberg (1901-1976). Schrödinger (1887-1961). Einstein (1879-1955). Pauli (1900-1958). Plank (1858-1947). Bohr-Rutherford . vs. Quantum. Similarities. Electrons have discrete amounts of energy. Dr. Ron Rusay. . Atomic Structure and Periodicity. Electromagnetic . Radiation. The . Nature of Matter. The . Atomic Spectrum of Hydrogen. The . Bohr Model. The . Quantum Mechanical Model of the Atom. cont’d. Ms. McGrath . Chemistry 11. Aufbau. . principle. States that in going from a hydrogen atom to a larger atom, you add protons to the nucleus and electrons to orbitals . You start at the orbitals having the lowest energy level and fill them, in order of increasing energy, until you run out of electrons. Chapter 5. The scale model shown is a physical model. However, not all models are physical. In fact, several theoretical models of the atom have been developed over the last few hundred years. You will learn about the currently accepted model of how electrons behave in atoms.. In a normal chemical reaction, the nucleus of an atom remains unchanged. However, in nuclear reaction, the nucleus of an atom often changes. This reaction causes radiation to be given off.. Radioactivity. 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.. Mrs. Medina. 1. Why do metals glow when heated?. 2. Models of the Atom. A model should explain not just what the material is made of (composition) but also how it is going to behave (changes).. Rutheford’s. Excited Gases . & Atomic Structure. Atomic Line Emission Spectra and . Niels. Bohr. Bohr’s greatest contribution to science was in building a simple model of the atom. It was based on an understanding of the. Models of the Atom-History in Models. Democritus. (450BC, GR): smallest bit that is still that element.. Joseph Proust . (1794 FR): proposed that compounds form in definite proportions. Proust’s experiments and law influenced Dalton.. in. Atoms. 1. I Can…………. Describe the Bohr Planetary Model of an atom. Describe light and how atoms emit light ( atomic emission spectra). Describe ground state vs. excited state. Describe the quantum mechanics model of an atom – 3 parts. Mrs. Medina. 1. Why do metals glow when heated?. 2. Models of the Atom. A model should explain not just what the material is made of (composition) but also how it is going to behave (changes).. Rutheford’s.