PPT-Atoms, Molecules, and Ions

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. The ions are arranged in a lattice. There is attractive electrostatic forces between the ions which are very strong e.g. sodium chloride ionic lattices. . Give two properties of giant ionic structures. . BONDING. A guide for A level students. KNOCKHARDY PUBLISHING. 2008 . SPECIFICATIONS. INTRODUCTION. This . Powerpoint. show is one of several produced to help students understand selected topics at AS and A2 level Chemistry. It is based on the requirements of the AQA and OCR specifications but is suitable for other examination boards.. 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. 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.. C2 1.1 Chemical bonding. Key words:. A . compound. contains two or more elements which are chemically combined. Covalent. bonding – sharing electrons. Ionic. bonding – transferring electrons. Chemical bonding: . 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 17- How Atoms Bond and Molecules Attract The Big Idea: Atoms and molecules are sticky 17.1 Electron-Dot Structures Valence electrons= electrons in outermost shell Electron- dot structures: a series of dots surrounding an atomic symbol 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. . WJEC Chemistry Unit 2- 2.1 (part). WJEC Double Award Unit 5- 5.1 (part). Periodic Table of Elements. Metals. Non-metals. Comparing the properties of metals and non-metals. Metals. Non-Metals. Good conductors of electricity. 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. . 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?.