Video Transcript
Atoms of the halogens can all form ions known as halides. What is the typical charge for ions in this group?
The halogens are a group of nonmetal elements located towards the right-hand side of the periodic table. They form group seven A or 17 of the periodic table. As they’re in group seven A, all of the atoms have seven outer-shell electrons.
The octet rule states that atoms tend to transfer or share electrons in order to obtain eight valence electrons. Following this rule, halogens tend to gain one electron. Electrons have a relative charge of negative one. As halogens tend to accept one electron, halide ions tend to have a charge of one minus.
Therefore, the typical charge for ions in group seven A is one minus.
