我想問關於chemistry的Covalant bonding(20 marks)

molecules 係 compounds with covalent bonds,,通常係non-metal atoms結合ge,,佢地係share電子,,而冇電子ge傳遞[如H2O,,CO2]
ions 係帶有正負charge ge,,通常metal同non-metal結合會有ions 產生,,matal ion[如Al^3+]一定係cation= +ion,,non-metal ion[如Cl^-]係anion= -ion,,係有電子ge傳遞...而係metal入面都會有metal ions
atom係最基本ge 單位,,係冇charge ge...[如H,O,C,Al,Cl]

atomicity means the number of atoms in a molecule[如it's 3 for H2O]

molecular formula[mf]係指a molecule 入面5同atom ge 比例,,structural formular[sf]係show埋d atoms/ions ge 分佈
如mf:C4H10,,但sf可以有幾種:CH3(CH2)2CH3//CH3CH(CH3)CH3

giant covalant structure 指個compound 入面d molecules/atoms 有(strong) covalent bonds 吸引佢地,,其實只有幾個例子:diamond(由C組成),,quartz(SiO2),,graphite(石墨)

希望幫到你=]