f.3 Chem !Chem高手請入! !緊急! !聽日考!

唔係好明咩係"a compond or molecule of compound" =.="
carbon dioxide 係 covalent compound,carbon dioxide 係made up of carbon dioxide molecule.而每1粒carbon dioxide molecule 有1個carbon dioxide atom 同 2 oxygen atom,佢地之間有d covalent bonds join住佢地3粒變做1個molecule,之後有1種force 叫 van der Waals' forces 將每粒carbon dioxide molecule join埋1齊變成carbon dioxide e個compound.


圖片參考：http://imgcld.yimg.com/8/n/HA04937267/o/701110300065313873487480.jpg



簡單d講,1粒molecule 係 1個element or compund 既smallest unit,而且係room condition/ordinary condition可以單獨存在.
好似oxygen咁,1粒oxygen既molecule 係要 2個oxygen atom 組成(O2)
即係2粒oxygen molecule 係oxygen既最細既單位
如果得1粒oxygen atom,佢就會唔夠stable,exist唔到.

compound有2種,ionic同covalent

ionic compound 係由cation 同 anion 組成(metal + non-metal)

covalent compound 係由 two or more electrons share 佢地既outermost shell electrons,令佢地既outermost shell變stable 而組成(non-metal+non-metal)
covalent bonds held 住 atoms組成molecule,之後有d force 叫van der Waals' forces held 住 每粒molecule 而變成1個compound)

Compound consists of ionic compound, covalent compound... I didn't heard the term molecule of compound before...