Intramolecular Forces vs. Intermolecular Forces Intramolecular forces Intramolecular forces?are forces?within?a molecule and are usually covalent bonds Covalent bonds?are formed when the out...
Electronegativity Electronegativity?is the power of an atom to attract the pair of electrons in a covalent bond towards itself The electron distribution in a covalent bond between elements w...
Effects of Bonding & Structure on Physical Properties Different types of?structure?and?bonding?have different effects on the?physical properties?of substances such as their?melting?and?b...
Metallic Lattice Structures Metals form?giant metallic lattices?in which the metal ions are surrounded by a ‘sea’ of?delocalised?electrons The metal ions are often packed in?hexagonal layers...
Covalent Lattice Structures Covalent lattices Covalent bonds?are bonds between nonmetals in which electrons are?shared?between the atoms Covalent compounds can be arranged in?simple molecula...
Ionic Lattice Structures Most ionic, metallic and covalent solids are?crystalline lattices The ions, atoms or molecules are arranged in a?regular and repeating arrangement Giant ionic lattic...
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 mov...
Representing Dot & Cross Diagrams Dot and cross diagrams?are diagrams that show the arrangement of the outer-shell electrons in an?ionic?or?covalent?compound or element The electrons are...
Dative Covalent Bonding In?simple?covalent?bonds, the two atoms involved share electrons Some molecules have a?lone?pair of electrons that can be donated to form a bond with an?electron-defi...
這兩年，美本在華招生幾乎年年“收緊”，英國則熱度暴漲、競爭越發激烈。同時，國內家長們對于留學的熱情卻是年年拔高。 除了英美這兩個大熱門選手外，世界上那么多國家，還有哪些留學的優質目的地？ 我們曾分享過...
Covalent Bonding Covalent?bonding occurs between two?non-metals A covalent bond involves the?electrostatic?attraction?between nuclei of two atoms and the bonding electrons of their outer shells No?...
Ionic Bonding 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?elemen...
