The elements belonging to the seventh group of the periodic table are termed the halogens. The five chemical elements present in this group are named fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At). According to the modern IUPAC rulings, the halogens are given group 17.
The literal meaning of the word halogen is salt-producing. Whenever there is a reaction between a halogen and a metal, salt is produced. The halogens require one electron in order to complete their outer octet and to acquire a noble gas configuration. Fluorine is the most reactive halogen whereas iodine gives slow reactions. The halogens are commonly used as disinfectants.
Using the general periodic table you developed in Question 25, show
Without looking at your textbook or the periodic table, name three
For each of the following elements, use the periodic table shown
Complete the following table. / /
Using the periodic table, complete the following table. /
For each of the following elements, use the table shown in
If an electric current is passed through aqueous solutions of sodium chloride
Use the periodic table shown in Fig. 4.9 to
The elements with known properties can be classified as metals (57
a. Draw the Lewis structures for these species. If more
