Group VIIA elements

Crystal Structure cubic orthorho orthorho orthorho - 

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A column of the periodic table is called a family. Some families have special names. Group IA elements are called alkali metals, group IIA elements are called alkaline earth metals, group VIIA elements are called halogens, and group VIIIA elements are called the noble gases. The group B elements are called transition elements. Elements with atomic numbers from 58 to 71 are called lanthanides, and elements with atomic numbers from 90 to 103 are called actinides. Families have similar chemical and physical properties. For example, the alkali metals are soft metals at room temperature they are shiny, conduct... 

Each rubidium halide (Group VIIA element) crystallizing in the NaCl-type lattice has a unit cell length 30 pm greater than that for the corresponding potassium salt of the same halogen. What is the ionic radius of Rb+ computed from these data ... 

Note that the highest values correspond to the Group VIIA elements. 

IONISATION AND ELFXTRODE POTENTIALS OF GROUP VIIA ELEMENTS... 

Halogens Group VIIA elements in the periodic table. 

Halogens Group VIIA elements F, Cl, Br, I, and At. The free elements exist as diatomic molecules. 

There is another series of cluster-type ternary carbides that contain not only metal and carbon atoms but also the group VIIA elements, Cl, Br and I (Simon et al. 1981, Warkentin et al. 1982, Simon and Warkentin 1983, Schwanitz-Schuller and Simon 1985, see also chapter 100, this volume). Electronic structure calculations have been... 

Bromine is a Group VIIA element in Period 4. Deduce the valence-shell configuration of bromine. 

The electronegativity of Group VIIA elements decreases going down the column of elements, so the electronegativity decreases from Cl to Br to I. The order of acid strengths is... 

The Group VIIA elements, called the halogens, have very similar propalies, or at least they have properties that change smoothly in progressing down the column. All are reactive nonmetals, except perhaps for astatine, whose chemistry is not well known. 

The Group VIIA elements, or halogens, are reactive. Chlorine (CI2), a pale greenish-yeUow gas, is prepared commercially hy the electrolysis of aqueous sodium chloride. Its principal uses are in the preparation of chlorinated hydrocarbons and as a bleaching agent and disinfectant. Hydrogen chloride, HCl, is one of the most important compounds of chlorine aqueous solutions of HCl are known as hydrochloric acid. 

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