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 ...
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?...
Solving Equations Graphically Solving (simultaneous) equations graphically This is a way to solve?simultaneous?equations?(see Simultaneous Equations) Coordinates of the?intersections?are the...
微信截圖_16589075769269.png)
Reciprocal Graphs - Sketching What are reciprocal graphs? Reciprocal graphs involve equations with an?Χ term on the denominator e.g. There are two basic reciprocal graphs to know for A level...
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...
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...
Sketching Polynomials Sketching the graph of a polynomial Remember a polynomial is any finite function with non-negative indices, that could mean a quadratic, cubic, quartic or higher power ...
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...
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...
