PPT-2. Atoms, molecules & ions

23 Atomic structure amp symbolism Write amp interpret symbols that depict atomic number atomic mass and charge of atoms amp ions Define the atomic mass unit amp average atomic mass Calculate average atomic mass amp isotopic abundance. Chapter 2 BLB 12. th. Expectations. Recognize important steps in the discovery of the atom and its structure.. Work with isotopes.. Learn about the periodic table.. Differentiate between molecular and ionic compounds.. Isotopes. Isotopes. : atoms of the same element that have different numbers of neutrons. Two isotopes of an element will have the same atomic number, but different mass numbers (and atomic masses). CARBON (above right). CHEMICAL BOND – A force that holds two or more atoms together as a unit. Individual atoms will naturally bond together to achieve a lower energy state (to be more stable). 3B-1 (of 42). TYPES OF BONDS. 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. Part 2. 1 dozen = 12 items. Let’s do some calculations. I have 12 dozen, how many eggs. ?. 12 x 12 = 144 eggs. I have 57 dozen, how many doughnuts. ?. 57 x 12 = 684 doughnuts. I have 10 dozen, how many golf balls. How elements become charged. How elements become charged. ION – A charged atom. All elements on the periodic table are NEUTRAL because they have the same number of . protons (+) and electrons (-). 1) What happens next?. Why?. 2) How can you maintain more blue molecules on the left . and. more red molecules on the right?. DO NOW. Answer . questions #1&2 . on your worksheets.. Put in a pump that would pump the blue molecules to the left and the red molecules to the right.. MACROSCOPIC SCALE. Elements combine to make compounds.. ATOMIC SCALE. Atoms combine to make molecules, or extended structures.. What we’ll cover…. Compound Formulas. Ions. Monatomic. Polyatomic. Ionic Compounds. Moles and Mass. The . molar mass . gives us the relationship between the . number of moles . and the . mass of an element or compound. .. We can . use the molar mass . to . calculate . the . mass. or . Chapter 11 – Transmembrane Transport of Ions and Small Molecules Chapter 11 – Transmembrane Transport of Ions and Small Molecules 11.1 Overview of Transmembrane Transport 11.2 Facilitated Transport of Glucose and Water 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. . Dr John Mitchell. ID1004: Approaches to Reality. For Years People Wondered …. What is the World Made of?. What is Matter?. I. s Water Made of the Same Stuff as Rock?. Is Matter Continuous?. Is Matter Continuous?. What is the atmosphere?. Dry air is a mixture of gases. Our atmosphere is made up of the following:. 78% Nitrogen. 21% Oxygen. 1% Argon. 0.04% Carbon Dioxide . Chemicals of air consists of atoms and small molecules. There are weak forces of attraction between the molecules so these chemicals have low melting and low boiling points.. together . by the weakest of chemical bonds, the van der . Waals . bond. The van der . Waals . bonds are so weak that they can be easily broken by the slightest pressure between two fingers, resulting in the sheets sliding over each other. This property is responsible for the softness of graphite and the greasy feeling one experiences when rubbing graphite between ones fingers. .