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The intermolecular interactions between halogen molecules are Van der Waals' forces. Explain how these Van der Waal's forces arise between halogen molecules.

Electrons are mobile or move in halogen molecules. Therefore, there can be an uneven distribution of electrons or electron density in halogen molecules (1 mark). This creates a temporary or instantaneous dip...
AL
Answered by Andrew L. • Chemistry tutor
10189 Views

Why is a nucleophilic substitution reaction between ammonia and benzene unlikely?

A nucleophilic substitution reaction is when a nucleophile (an electron pair donor) replaces an atom or part of a molecule. In this scenario ammonia (NH 3 ) is the nucleophile as it contains a lone pair of e...
AS
Answered by Archit S. • Chemistry tutor
11729 Views

The pH of pure water can vary depending on the temperature it is held at. Does that mean pure water can be acidic or alkaline?

Interestingly, pure water will always be neutral, regardless of pH. To understand why, we have to properly look at what pH means. pH is a measure of the number of free H+ ions in a solution or liquid. The am...
SN
16229 Views

What are isotopes?

Isotopes are a variant of a particular chemical element in the Periodic Table. They have the same atomic number, therefore the same number of protons and electrons. However they have a different number of ne...
PA
Answered by Priya A. • Chemistry tutor
4939 Views

Why do first ionisation energies decrease down a group?

This is an example of remembering the basic trends of ionisation energies of different elements across the periodic table and applying this knowledge in detailWe take the Bohr model of the atom where the ene...
BD
Answered by Bence D. • Chemistry tutor
2322 Views