Top answers

Chemistry
A Level

Why does the atomic radius decrease as you move along a period.

As you move along the period the proton number increases and the electrons are added to the same shell meaning no extra electron shielding occurs. Therefore the nuclear attraction to the outer most elect...

TM
Answered by Taylor M. Chemistry tutor
2957 Views

How do London Forces/Van der Waal's forces arise?

In the outer shells of atoms, electrons move around uncontrollably and spontaneously, these leads to there being an uneven distribution of electrons in this region. This uneven distribution induces a dipo...

RA
Answered by Raisha A. Chemistry tutor
6875 Views

What is hybridisation and how can it be used to explain the shapes of molecules?

Before we start on exploring the implications of hybridisation, we should start with a definition. Hybridisation can be thought of as the mixing atomic orbitals into new hybrid orbitals suitable that can ...

RM
Answered by Rebecca M. Chemistry tutor
5711 Views

What is the difference between a heterogeneous catalyst and a homogeneous catalyst?

Homogeneous catalyst - catalyst is in the same phase as the reactants. Heterogeneous catalyst - catalyst is in a different phase as the reactants. What ...

KW
Answered by Katie W. Chemistry tutor
7465 Views

How would you check for halides within a compound and differentiate between them?

Add silver nitrate to the aqueous solution. If a precipitate forms then solution contains halide ions. Chloride: white. Bromide: cream. Iodide: pale yellow. Adding dilute ammonia will dissolve the chlori...

AN
Answered by Artem N. Chemistry tutor
2652 Views

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