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Why does ionisation energy of elements generally decrease as you move down a group in the periodic table?

Ionisation energy is the energy required to remove the most loosely bound (furthest out) electron from an atom, in the gaseous state.
As you move down a group in the periodic table, the number of...

SB
Answered by Sam B. Chemistry tutor
6863 Views

How many different types of sentence logic relationships (sytactic relations) are there in Mandarin?

As a frequently tested point in A level papers, the logic relationships of sentences and the according conjunctions are very important in reading Chinese articles. Unlike English langu...

XW
Answered by Xing W. Mandarin tutor
4783 Views

How do you form the future indicative tense with regular verbs?

The future indicative tense is used to describe actions that will happen in the future. It is formed with regular verbs through taking the infinitive form of -er, -ir, and -re

RC
Answered by Rob C. French tutor
3965 Views

Explain, in terms of the behaviour of molecules, how a gas exerts a pressure on the walls of its container. (4)

This question is 4 marks so you need to make at least 4 points.

These types of questions just require memorising the 4 points:

Lots of molecules collide with the walls.

<...
JF
Answered by Jake F. Physics tutor
24322 Views

Simplify (7+sqrt(5))/(sqrt(5)-1), leaving the answer in the form a+b*sqrt(5)

Step 1 - Identify the difference between the required form of the answer and the expression to be simplified: 

It can be...

IR
Answered by Ian R. Maths tutor
21250 Views

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