AQA A Level Chemistry復(fù)習(xí)筆記1.5.2 Bond Polarity
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...
AQA A Level Chemistry復(fù)習(xí)筆記1.4.10 Effects of Structure & Bonding
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...
AQA A Level Chemistry復(fù)習(xí)筆記1.4.9 Properties of Metallic Substances
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...
AQA A Level Chemistry復(fù)習(xí)筆記1.4.8 Properties of Covalent Substances
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...
AQA A Level Chemistry復(fù)習(xí)筆記1.4.7 Properties of Ionic Compounds
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...
AQA A Level Chemistry復(fù)習(xí)筆記1.4.6 Metallic Bonding
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...
AQA A Level Chemistry復(fù)習(xí)筆記1.4.5 Dot & Cross Diagrams
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...
AQA A Level Chemistry復(fù)習(xí)筆記1.4.4 Dative Covalent Bonding
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...
盤(pán)點(diǎn)11個(gè)優(yōu)質(zhì)小眾留學(xué)國(guó)家，高性?xún)r(jià)比及高含金量！附各個(gè)國(guó)家最新出入境政策
這兩年，美本在華招生幾乎年年“收緊”，英國(guó)則熱度暴漲、競(jìng)爭(zhēng)越發(fā)激烈。同時(shí)，國(guó)內(nèi)家長(zhǎng)們對(duì)于留學(xué)的熱情卻是年年拔高。 除了英美這兩個(gè)大熱門(mén)選手外，世界上那么多國(guó)家，還有哪些留學(xué)的優(yōu)質(zhì)目的地？ 我們?cè)窒磉^(guò)...
AQA A Level Chemistry復(fù)習(xí)筆記1.4.3 Covalent Bonding
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?...
AQA A Level Chemistry復(fù)習(xí)筆記1.4.2 Ionic Bonding
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...
AQA A Level Chemistry復(fù)習(xí)筆記1.3.4 The Ideal Gas Equation
The Ideal Gas Equation Kinetic theory of gases The kinetic theory of gases?states that molecules in gases are constantly moving The theory makes the following assumptions: That gas molecules...
