Covalent Bonding: Definition & Examples Covalent?bonding occurs between two?nonmetals A covalent bond involves the?electrostatic?attraction?between nuclei of two atoms and the bonding electrons...
Metallic Bonding: Definition Metal?atoms are tightly packed together in?lattice?structures When the metal atoms are in lattice structures, the electrons in their outer shells are free to move throu...
Ionic Bonding: Examples Sodium chloride Sodium is a Group 1?metal It?loses?its outer electron to form a sodium ion with a +1 charge (Na+) Chlorine is a Group 7?non-metal It?gains?1 electron to form...
Ionic Bonding: Definition As a general rule,?metals?are on the?left?of the Periodic Table and?nonmetals?are on the?right-hand?side Ionic?bonding?involves the?transfer?of electrons from a?metallic?e...
Electronegativity: Predicting Bond Formation The differences in Pauling electronegativity values can be used to predict whether a bond is?covalent?or?ionic?in character Electronegativity & cova...
Electronegativity: Trends Electronegativity?varies across?Periods?and down the Groups of the Periodic Table Down a group There is a?decrease?in?electronegativity?going down the Group The?nuclear ch...
Electronegativity: Definition Electronegativity?is the ability of an atom to attract a pair of electrons towards itself in a covalent bond This phenomenon arises from the?positive?nucleus’s ability...
Mole Calculations The number of moles of a substance can be found by using the following equation: It is important to be clear about the type of particle you are referring to when dealing with mole...
作為英聯(lián)邦國家，用A-Level成績申請澳洲大學(xué)很有優(yōu)勢。澳洲八大名校對于A-Level的成績要求比高考成績要寬松很多，升讀名校更容易。 澳大利亞八校聯(lián)盟（Group of Eight，簡稱Go8或G8），又稱澳大利亞八大名校、澳...
