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The phrase amphoteric describes a compound that reacts with both acids and bases. 

NaOH can react with both AlCl₃ and MgCl₂ to give a white precipitate but the addition of exc...

Mg2+ is the smaller ion. (1 mark) Mg2+ has a larger nuclear charge than Na+ and has the same number of electrons. (1 mark)

Further explaination: Magnesium is further along the period than sodium is...

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The first ionisation energy is the energy required to remove one mole of electrons from one mole of gaseous atoms from its valence shell.

Hydrogen bonding is a strong dipole-dipole attraction between a lone pair of electrons on a highly electronegative atom, such as oxygen or nitrogen, and a hydrogen atom on another molecule. In the case of...