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Chemistry

A Level

How does free radical substitution work?

(This explanation would make use of diagrams on a whiteboard)It is useful to break this down into three steps: 1- the initiation step. Let's take the reaction between Cl₂ and CH₄.

Answered by Tom H. • Chemistry tutor

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What is an empirical formula and how do I calculate it?

The empirical formula of a compound is the simplest ratio of the atoms present in that compound and it can be calculated relatively easily by following a few simple steps:Let's use an example of a hydroca...

Answered by Victoria O. • Chemistry tutor

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What trends are shown as you go down group 2 of the periodic table?

Group 2 (the alkaline earth metals) show many different trends. As you go down, the size of the atoms increases. This is due to the fact that each element has an extra full main level of electrons compare...

Answered by • Chemistry tutor

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Explain the principle behind chemically reactive and inert molecules

Electronegativity.
Molecules with atoms which possess an almost full outer shell will always be seeking to draw in the extra electron(s) to fill up their outer shells.Likewise molecules with atoms wh...

Answered by Irtiza S. • Chemistry tutor

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Explain why atomic radius decreases across a period

As you go along a period, there is an increasing number of protons in the nucleus of each atom meaning that the nucleus has an increasing positive charge.This means that the electrons are puller closer to...

Answered by Tutor406540 D. • Chemistry tutor

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