Gases: Gas Pressure Gases?in a container exert a?pressure?as the gas molecule are constantly?colliding?with the wall of the container Gas particles exert a pressure by constantly colliding with the...
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 shown as dots and c...
A-Level大考今日放榜，同學(xué)們可以抓緊時(shí)間查詢(xún)自己的分?jǐn)?shù)。出分后，AS階段的考生若對(duì)此次A-Level成績(jī)滿意，即可著手準(zhǔn)備2023年的留學(xué)事宜；A2階段的考生若成績(jī)滿足院校申請(qǐng)要求，那么后續(xù)只需等待相應(yīng)院校的確認(rèn)...
此前由于疫情原因，各個(gè)國(guó)際大考相繼出現(xiàn)考試形式的更改問(wèn)題，其中個(gè)別地區(qū)的A-Level大考就因此轉(zhuǎn)換為POE或TAG形式，許多同學(xué)不免擔(dān)憂評(píng)估出分會(huì)導(dǎo)致高分通脹情況。 同學(xué)們的擔(dān)憂是否會(huì)成為既定事實(shí)？相信隨著今...
Comparing Bonds to Intermolecular Forces Intramolecular forces Intramolecular forces?are forces?within?a molecule Ionic bonding?is the?electrostatic attraction?between?positive?(cations) and?negati...
van der Waals' Forces & Dipoles Covalent bonds are strong?intramolecular forces Molecules also contain weaker?intermolecular forces?which are forces?between?molecules These intermolecular force...
Polarity & Dipole Moments Electronegativity?is the ability of an atom to draw a pair of electrons towards itself in a covalent bond Electronegativity?increases?across a Period and?decreases?goi...
Hydrogen Bonding Hydrogen bonding Hydrogen bonding?is the?strongest?form of?intermolecular bonding Intermolecular bonds are bonds?between?molecules Hydrogen bonding is a type of?permanent dipole – ...
Covalent Bonding: Bond Energy & Length Bond energy The?bond energy?is the energy required to?break?one mole of a particular covalent bond in the gaseous states Bond energy has units of kJ mol-1...
