*MEGATHREAD* - BMAT for 2016 Entry Discussion

please can someone help with this question

please can someone explain these pls?

The way i worked out this question was by firstly, working out the area of the largest dark circle, and then subtracting the area of the largest white circle. This would give the area of the larger shaded dark section. Than i did the same with the 2 smaller circles. This would give you area of the smaller shaded dark section. Then add them together and theres your answer!
Hope that helps x


Posted from TSR Mobile

Alpha is made of two protons and two neutrons, therefore it is poor at penetrating through materials. Therefore when you put a piece of, for example, alluminium, infront of it, the detector would not detect it!
Beta is fairly good at penetration and gamma is very good. So i came to the last answer, because even when the sheets of material are placed infront of the radiation beam, they are still detected


Posted from TSR Mobile

please can someone explain these answers

This is related to the reactivity series. So you got to think that anything that is less reactive than vanadium and zinc cannot be used to obtain the metal from its ore


Posted from TSR Mobile

Anyone willing to mark a section 3 essay? I also don't mind marking

ahh ok thanks!
sorry i dont get why i can't be b or d or e
D is the correct answer?
pls could you explain it

Is anyone else just loosing motivation to revise for the BMAT? Like, I'm just sitting here and should be doing questions but just don't have the will to...

All of the metals mentioned in the answers are more reactive than Vanadium so they will displace the sulfate from it to form a metal sulfate and vanadium. Only iron is less reactive than vanadium so it cannot displace the sulfate from the vanadium,

Hope this helps!

90 students had A-C grades in their mock and in their real exams and 60 students had other grades in the mock and real exams so 90+60=150
150/total = 150/(150+25+25) = 150/200
= 75%


Posted from TSR Mobile

All of the metals mentioned in the answers are more reactive than Vanadium so they will displace the sulfate from it to form a metal sulfate and vanadium. Only iron is less reactive than vanadium so it cannot displace the sulfate from the vanadium,

Hope this helps!

AHHH thanks!
any idea where you got this info from cause i wanna do some more reading on this?

look at the reactivity series

do i need to learn this off by heart