Periodic Table Group 7 (Halogens) Menu - Chemguide

PERIODIC TABLE GROUP 7 (HALOGENS) MENU

Note: If you use the current IUPAC (international Union of Pure and Applied Chemistry) system for group numbering, you will probably know what I call Group 7 as Group 17. My reasons for not using the IUPAC system are discussed on this page in the Questions and Comments section.

Atomic and physical properties . . .

Discusses trends in atomic radius, electronegativity, electron affinity and melting and boiling points of the Group 7 elements. It also looks at the bond strengths of halogen-halogen bonds and of hydrogen-halogen bonds.

Halogens as oxidising agents . . .

Describes and explains the trend in oxidising ability of the Group 7 elements based on the reactions between one halogen and the ions of another one - for example, between Cl2 and I- ions from salts like KI.

More reactions of halogens . . .

The reactions of halogens with hydrogen, phosphorus, sodium, iron, iron(II) ions, and sodium hydroxide solution.

The acidity of the hydrogen halides . . .

Discusses the acidity of the hydrogen halides (like hydrogen chloride), and explains why HF is a weak acid.

Halide ions as reducing agents . . .

Describes and explains the trend in reducing ability of the halide ions based on their reactions with concentrated sulphuric acid.

Testing for halide ions . . .

Describes and explains the tests for halide ions using silver nitrate solution followed by ammonia solution.

The manufacture of chlorine . . .

Describes the manufacture of chlorine by the electrolysis of sodium chloride solution using a diaphragm cell and a membrane cell.

Go to inorganic chemistry menu . . .

Go to Main Menu . . .

© Jim Clark 2002 (last modified October 2012)