Lawrie Ryan and Roger Norris Solutions for Chapter: Electrons in Atoms, Exercise 1: BEFORE YOU START

What are the relative mass and relative charges of proton and electron ?

What is meant by the terms electron shell and electronic configuration ?

Explain to another learner.
Why in terms of electronic configuration, the gases helium,neon and argon are relatively unreactive.
 

Draw a labelled diagram to show the structure of a calcium atom.

What prefixes do you know that can be placed before the basic unit and what is their relationship to the basic unit ? For example, a centimetre (cm) is one-hundredth of a metre (m). 

Practise writing units in standard form,e.g $\mathrm{g}/{\mathrm{cm}}^3$becomes $\mathrm{g} {\mathrm{cm}}^{-3}$(the negative 3 shows that the ${\mathrm{cm}}^3$ is the divisor).Try changing the following into the standard form: 
$\mathrm{mol}/{\mathrm{dm}}^3$

Practice writing units in standard form,e.g $\mathrm{g}/{\mathrm{cm}}^3$becomes $\mathrm{g} {\mathrm{cm}}^{-3}$(the negative 3 shows that the ${\mathrm{cm}}^3$ is the divisor). Try changing the following into the standard form: 
$\mathrm{KJ}/\mathrm{mol}$