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Chemistry
A Level

Why do ionisation energies typically increase upon going across a period yet decrease upon going down a group?

‘Ionisation energy’ is the term used to describe the amount of energy it takes to remove an electron from an atom to form a positively charged ion. It is usually represented by the unit kJ/mol, meaning it...

LM
Answered by Lewis M. Chemistry tutor
2477 Views

What is a mole and why is it useful?

The number of moles is related to the amount of a substance we have. If we were to use the number of particles, the numbers would be huge and impractical to use. So, Avagadro's number provides us a link w...

ML
Answered by Michael L. Chemistry tutor
3007 Views

What factors influence the reaction rate?

There are 5 main factors that affect the rate of reaction. 1. Concentration: Increasing the concentration increases the frequency of collisions between particles. 2. Surface Area: Increasing the surface a...

JT
Answered by James T. Chemistry tutor
2788 Views

State what is meant by the term structural isomer?

Same molecular formulas, but bonded in different ways. So by this I mean that 2 molecules could have the same formula but have a different structure, they have bonded together differently.

BP
Answered by Bradley P. Chemistry tutor
7502 Views

why increasing the temperature will increase the rate of reaction

because increasing the temperature will increase the kinetic energy of molecules, hence there is more collisions between the molecules and more molecules having the IE above the activation energy

HZ
Answered by Huairen Z. Chemistry tutor
2373 Views

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