Search over 10,000 free study notes

reactivity increases DOWN the group

Extra shells of electrons means there is increased shielding, and therefore atomic radii increases

even though nuclear charge increases, the extra shieldi...

The first thing you need to do is collect all the 'like terms' on the same side of the equation. Start with the 'x' terms and remember to reverse the signs as you cross them over to the other side. 

1. Move everything to the same side: 2x^3-12X^2-10x=0 2.Take out a factor of 2x: 2x(x^2-6x-5)=0 3.Complete the square on the quadratic: 2x[(x-3)^2-14]=0

This question is taken from AQA 2016 question 1 part 2, http://filestore.aqa.org.uk/sample-papers-and-mark-schemes/2016/june/AQA-74071-QP-JUN16.PDF

The force is acting on the air by the engine. By ...

In competitive market, there is no governement interference and a lot buyers and sellers, so the market can operate equilibrium. When there is excess supply, there are too many goods which are not purchas...