Top answers


Why does the First Ionisation Energy decrease down a group in the Periodic Table?

Two major factors control how tightly held the outermost electron is and therefore how much energy is required to remove it, which gives us the size of the Ionisation energy. The first of these factors is sh...
DK
Answered by Daniel K. Chemistry tutor
57866 Views

What is meant by the 'First Ionisation Energy' of an element?

The ionisation energy of an element is the energy required to remove the one of the outermost electrons from an atom of the element in its gaseous state. This is quite a difficult process to measure the ener...
DK
Answered by Daniel K. Chemistry tutor
4912 Views

How can aldehydes and ketones be distinguished?

Firstly note that in general aldehydes are more reactive than ketones. This is a result of two effects: 1. Ketones are more sterically hindered. 2. Alkyl groups are electron donating and so reduce the partia...
GB
Answered by George B. Chemistry tutor
63794 Views

How do mass spectrometers work?

A mass spectrometer is a piece of lab equipment used to measure the relative atomic masses of atoms and molecules. It is widely used to identify substances in the lab. The process is often automated and requ...
GB
Answered by George B. Chemistry tutor
4524 Views

What is an unsaturated hydrocarbon?

Unsaturated hydrocarbons contain at least one carbon carbon double bond , the simplest is the alkene. They are more reactive than saturated hydrocarbons because they have the ability to undergo addition reac...
CA
Answered by Chloe A. Chemistry tutor
17698 Views