Inorganic Chemistry I - AQA Chemistry A-level

Atomic radius trend

Atomic radius decreases across a period due to increasing positive charge.

Element classification

Elements are classified as s, p, d, or f block based on their position in the Periodic Table.

Ionisation energy trend

Ionisation energy generally increases across a period due to stronger attraction of outer shell electrons.

Periodicity

Trends in element properties with increasing atomic number, caused by changes in atomic structure.

Proton number

Number of protons in an element's nucleus, determining its position in the Periodic Table.

Barium meals

Barium sulfate in barium meals helps diagnose stomach or intestinal problems by blocking x-rays.

Extraction of titanium

Process involving magnesium to extract titanium from its ore using chemical reactions and purification.

Flue gases

Gases emitted from chimneys and industrial exhausts.

Solubility

Ability of a substance to dissolve in a solvent, with Group 2 hydroxides and sulfates showing specific trends.

Sparingly soluble

Compounds with very low solubilities, like magnesium hydroxide.

Test for sulfates

Add acidified barium chloride to detect sulfate ions by forming a white precipitate of barium sulfate.

Wet scrubbing

Process to remove acidic sulfur dioxide from flue gases by reacting with an alkali.

Displacement

Chemical reaction where a halogen replaces another halide in a compound based on its position in the Periodic Table.

Disproportionation

Reaction where a substance undergoes simultaneous reduction and oxidation, like chlorine with sodium hydroxide.

Electronegativity

Atom's tendency to attract a bonding pair of electrons.

Oxidising ability

Ability to act as an oxidising agent, decreasing down the halogen group due to atomic size.

Redox reaction

Reaction involving simultaneous oxidation and reduction processes.

Reducing ability

Ability to act as a reducing agent, increasing down the halogen group due to electron loss ease.