PS.3 The student will investigate and understand the modern and historical models of atomic structure. Key concepts include the contributions of Dalton, Thomson, Rutherford, and Bohr in understanding the atom; and the modern model of atomic structure. Essential Understandings Essential Knowledge, Skills, and Processes The critical scientific concepts developed in this standard include the In order to meet this standard, it is expected that students will following: describe the historical development of the concept of the atom and the Many scientists have contributed to our understanding of atomic contributions of Dalton, Thomson, Rutherford, Bohr and other structure. scientists (Schrödinger). The atom is the basic building block of matter and consists of subatomic differentiate among the three basic particles in the atom (proton, particles (proton, neutron, electron, and quark) that differ in their neutron, and electron) and their charges, relative masses, and location, charge, and relative mass. Protons and neutrons are made up locations. of smaller particles called quarks. compare the Bohr atomic model to the electron cloud model with Size at the atomic level is measured on the nanoscale. respect to its ability to represent accurately the three-dimensional structure of the atom. Scientists use models to help explain the structure of the atom. Their understanding of the structure of the atom continues to evolve. Two models commonly used are the Bohr and the “electron cloud” (Quantum Mechanics) models. The Bohr model does not depict the aspect of an atom, and it implies that electrons are in static orbits. The model better represents our current “electron cloud” understanding of the structure of the atom.
PS.3 The student will investigate and understand the modern and historical models of atomic structure. Key concepts include the contributions of Dalton, Thomson, Rutherford, and Bohr in understanding the atom; and the modern model of atomic structure. Essential Understandings Essential Knowledge, Skills, and Processes The critical scientific concepts developed in this standard include the following: Many scientists have contributed to our understanding of atomic structure. The atom is the basic building block of matter and consists of subatomic particles (proton, neutron, electron, and quark) that differ in their location, charge, and relative mass. Protons and neutrons are made up of smaller particles called quarks. Size at the atomic level is measured on the nanoscale. Scientists use models to help explain the structure of the atom. Their understanding of the structure of the atom continues to evolve. Two models commonly used are the Bohr and the “electron cloud” (Quantum Mechanics) models. The Bohr model does not depict the aspect of an atom, and it implies that electrons are in static orbits. The “electron cloud” model better represents our current understanding of the structure of the atom. In order to meet this standard, it is expected that students will describe the historical development of the concept of the atom and the contributions of Dalton, Thomson, Rutherford, Bohr and other scientists (Schrödinger). differentiate among the three basic particles in the atom (proton, neutron, and electron) and their charges, relative masses, and locations. compare the Bohr atomic model to the electron cloud model with respect to its ability to represent accurately the three-dimensional structure of the atom.
physical_science.docx