Q2: Group 2 Trends

yamchips

2b is like a classic "explain the trend" question, so i feel like there are some common things that you use for all questions of this type

"Explain the trend of thermal stability"
Maybe just always mention:

Cationic radius
Charge density
polarisation/distortion of anion

🤔

yamchips

I swear almost all the questions of this type that I come across is just always state these 3 things, and then argue in the direction you wanna argue towards lmao

matthewkim2310

same for my version of chem
like im assuming its some thermal decomp or smth u js talk about cation radius / charge density / polarisation of bond or soemthing idk

prolly gotta throw in smth else for a2 cos thats as content i js said

ALSO im pretty sure if it asks for trend in temperature or smth u gotta mention at the end ... takes more energy -> higher temperature or smth like that

yamchips

matthewkim2310 yeah like "takes more energy to break the bonds" type shi

"Due to greater cationic radii, going down the group, the charge density of the cation is decreased. As a result, the anion becomes less polarised/distorted, hence requiring more heat energy to decompose it, leading to a greater thermal stability going down group 2."