AQA A Level Chemistry復習筆記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復習筆記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復習筆記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11個優質小眾留學國家，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...
AQA A Level Chemistry復習筆記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復習筆記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復習筆記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復習筆記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復習筆記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...
AQA A Level Chemistry復習筆記1.2.6 Hydrated Salts
Water of Crystallisation Water of crystallisation?is when some compounds can form?crystals?which have?water?as part of their structure A compound that contains water of crystallisation is ca...
AQA A Level Chemistry復習筆記1.2.5 Atom Economy
Atom Economy The atom economy of a reaction shows how many of the atoms used in the reaction become the desired product The rest of the atoms or mass is wasted It is found directly fr...
最新！URAP世界大學學術排名！
想了解一所學校的學術排名 一定不要錯過URAP的 世界大學學術排名！ 這份最近出爐的名單里 華大學術能力碾壓清華？ 前十名的學校究竟有多牛？ 這篇文章告訴你~ 前言 隨著全球化推動了研究與開發各方面的快速變化，...
