Noble gases (group 8 or 0) are unreactive because their atoms have stable arrangements of electrons.
Atoms of other elements can get a stable arrangement by gaining or losing electrons to make ions, or sharing electrons to make covalent bonds.
When an element in group 1 reacts with an element in group 7, an electron is transferred between them. The group 1 atom will lose an electron, the group 7 one will gain it. The group 1 atom will become positively charged. The group 7 atom will become negatively charged.
Positive and negative ions attract to make ionic bonds.
Comments
No comments have yet been made