PPT-Electrons in Atoms

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. pick up your midterms from front of . class. Average. : . 67 . % Top . grade: . 91 % . . ☺ ☺ . . Make sure you go through your test . and the . solutions carefully . to . understand where you went wrong.. At the end of this lesson, you need to draw . a diagram for each model showing the evolution of atomic theory:. ". Plum-Pudding" Model. Rutherford . Atom. Rutherford-Bohr . Atom. Charge-Cloud . Model. Periodic Trends. When the elements are arranged on the Periodic Table, certain characteristics of atoms show . trends. within the groups and periods.. These trends are observed as a . gradual increase. There are two kinds of pure substances. Elements. Compounds. Let’s start the new notes…. Elements. Substance that cannot be separated or broken down into simpler substances by chemical means.. Ex’s- . Drawing Molecules on Paper. Lewis Structures (or Dot Structures) are one way we draw molecules on paper. Since paper is 2-D and molecules aren’t, it’s not a perfect way to represent how molecules bond…but it’s a good way to begin to visualize molecules. If we can’t see the electron, and it has no mass, then why is it important?. BONDING!. Electrons are the only particle that participate in bonding between atoms.. How do we know when and how things will bond, though?. Why do Atoms Combine?. Compounds form when elements combine. Ex: . C + O. 2 . . CO. 2. . Elements combine based on the # of valence electrons they have. Elements combine so that their outer . shell is . Atoms are composed of protons, neutrons and electrons. These subatomic particles are charged….. Atoms make elements… Elements can’t be broken down into anything simpler. . Examples:. Carbon= C. The structure of atoms dictate their properties. How atoms combine dictate what we see in the many . minerals. in nature. . New technologies allow us to peer ever closer at the minute structures of minerals, down to the scale of individual atoms.. Bell work for November 25, 2018. Directions-Many Scientific words, such as . bond. , also have everyday meanings. Use context clues to write your own definition for each meaning of the word . bond. . 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. Bonding. Door. SMARTBOARD. Door. SMARTBOARD. Go to your ASSIGNED seat!!. Go to your ASSIGNED seat!!. Door. SMARTBOARD. CATALYST. Can two anions form an ionic bond? Why or why not?. *Answer in complete sentences!. Atoms are neutral. Protons = Electrons. There are special kinds of atoms..... Ions. Isotopes. Ions. An Ion is an atom that has gained or lost ELECTRONS, so it has an overall charge. If an atom gains electrons, it’s overall charge becomes negative. If an atom loses electrons, it’s overall charge becomes positive. . Which particles make up the mass?. How many electrons can go on each shell?. Date:. YEAR 10 CHEMISTRY SESSION. Monday, 29 June 2020. Name the 3 subatomic particles?. Protons, electrons and neutrons. Which particles make up the mass?.