IB DP Chemistry: SL復習筆記4.2.2 Shapes of Molecules
Shapes of Molecules When an atom forms a covalent bond with another atom, the electrons in the different bonds and the non-bonding electrons in the outer shell all behave as negatively charged clou...
IB DP Chemistry: SL復習筆記4.2.1 Resonance Structures
Resonance Structures The delocalization of electrons can explain the structures of some species that don’t seem to fit with a Lewis structure Delocalized electrons are electrons in a molecule, ion ...
IB DP Chemistry: SL復習筆記4.1.6 Lewis Structures
Lewis Structures Lewis structures?are simplified electron shell diagrams and show pairs of electrons around atoms. A pair of electrons can be represented by dots, crosses, a combination of dots and...
IB DP Chemistry: SL復習筆記4.1.5 Bond Polarity
Bond Polarity When two atoms in a covalent bond have the?same electronegativity?the covalent bond is?nonpolar The two chlorine atoms have identical electronegativities so the bonding electrons are ...
IB DP Chemistry: SL復習筆記4.1.4 Covalent Bonds
Covalent Bonds Covalent?bonding occurs between two?non-metals A covalent bond involves the?electrostatic?attraction?between nuclei of two atoms and the electrons of their outer shells No?electrons?...
IB DP Chemistry: SL復習筆記4.1.3 Formulae & Names of Ionic Compounds
Formulae & Names of Ionic Compounds Ionic?compounds?are formed from a?metal?and a?nonmetal?bonded together Ionic compounds are electrically neutral; the positive charges equal the negative char...
IB DP Chemistry: SL復習筆記4.1.2 Ionic Compounds
Ionic Lattices The ions form a?lattice?structure?which is an evenly distributed?crystalline?structure Ions in a lattice are arranged in a?regular?repeating?pattern?so that positive charges cancel o...
IB DP Chemistry: SL復習筆記4.1.1 Forming Ions
Forming Ions As a general rule,?metals?are on the?left?of the Periodic Table and?non-metals?are on the?right-hand?side Ionic?bonds?involve the?transfer?of electrons from a?metallic?element to a?non...
IB DP Chemistry: SL復習筆記3.2.3 Periodic Trends: Group 17 - The Halogens
Halogens The halogens These are the group 17 non-metals that are?poisonous?and include fluorine, chlorine, bromine, iodine and astatine Halogens are?diatomic, meaning they form molecules of?two?ato...
