OCR Salters Group 2 - earth metals,
Group 2 elements form 2+ ions.
Element Atom Ion
Be 1s2,2s2 1s2
Mg 1s2,2s2,2p6,3s2 1s2,2s2,2p6,3s2,3p6
(All Group 2 elements all have two electrons in their outer shell (s2). They lose their two electrons to form 2+ ions. Their ions then have every atom's dream structure - that of a noble gas.
Reactivity Increases as you go down the group
- As you go down a group, the ionisation energies decrease. Due to the increasing atomic radius and shielding.
- When Group 2 elements react they lose electrons, forming positive ions (cations). The easier it is to lose electrons the…