Group 17: Physical Trends The group 17 elements are called?halogens The halogens have uses in water purification and as bleaches agents (chlorine), as flame-retardants and fire extinguishers (bromi...
ISSCY聯合國高中人文社科寫作比賽是一個面向全世界高中生的研究學術活動，由聯合國協會世界聯合會（WFUNA）、美國青年會（YOUTHECA USA）等其他全球非政府組織共同主辦和贊助的，作為高度競爭的活動項目，此學術...
Trends in Solubility in Group 2 Hydroxides & Sulfates Group 2 hydroxides Going down the group, the solutions formed from the reaction of Group 2 oxides with water become more?alkaline When the ...
Group 2: Physical & Chemical Trends Chemical trends All elements in Group 2 (also called?alkali earth metals)?have the two electrons in their?outermost principal quantum shell All Group 2 metal...
Group 2: Thermal Decomposition of Nitrates & Carbonates Thermal decomposition?is the breakdown of a compound into two or more different substances using?heat Thermal decomposition of carbonates...
Reactions of Group 2 Oxides, Hydroxides & Carbonates Reactions of Group 2 oxides with water All Group 2 oxides are?basic, except for BeO which is?amphoteric?(it can act both as an acid and base...
Reactions of Group 2 Elements The Group 2 elements react with oxygen, water and dilute acids Group 2 reactions table Group 2 reactions with oxygen & water chemical equations Group 2 reactions w...
Periodicity: Predicting Position & Properties If the?chemical?and?physical?properties?of an element are known, the?position?of that element in the Periodic Table can be predicted Similarly, pre...
Bonding in Period 3 Chlorides & Oxides Period 3 chlorides The bonding and structure of the Period 3 elements are summarised in the table below: The table shows that?Na,?Mg?and?Al?are metallic e...
Period 3: Trends in Electronegativity & Bonding Electronegativity Electronegativity?is the power of an element to draw the electrons towards itself in a covalent bond Going?across?the period, t...
Reaction of Period 3 Chlorides & Water Chlorides of Period 3 elements show characteristic behaviour when added to water which can be explained by looking at their?chemical bonding?and?structure...
Acid / Base Behaviour of Period 3 Oxides & Hydroxides Period 3 oxides Aluminium oxide is?amphoteric?which means that it can act both as a base (and react with an acid such as HCl) and an acid (...
