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...
盤點(diǎn)11個優(yōu)質(zhì)小眾留學(xué)國家，高性價比及高含金量！附各個國家最新出入境政策
這兩年，美本在華招生幾乎年年“收緊”，英國則熱度暴漲、競爭越發(fā)激烈。同時，國內(nèi)家長們對于留學(xué)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(xué)的優(yōu)質(zhì)目的地？ 我們曾分享過...
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...
AQA A Level Chemistry復(fù)習(xí)筆記1.3.3 Reacting Volumes
Volumes & Concentrations of Solutions The?concentration?of a solution is the amount of?solute?dissolved in a?solvent?to make 1 dm3?of??solution The solute is the substance that dissolves...
AQA A Level Chemistry復(fù)習(xí)筆記1.3.2 Reacting Masses
Reacting Masses 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 deali...
