(1) It is called a cation if a positive charge exists and an anion if a negative charge exists.

(2) The key step in a unimolecular reaction is the formation of the carbon cation , or carbonium ion, by the departure of the leaving group.

(3) When two atoms swap electrons to produce a cation and an anion, the two ions are attracted to each other.

(4) The development of both cationic and anionic exchange materials did not occur until 1935.

(5) Synthetic small interfering RNA molecules can be introduced into cells by using reagents such as cationic lipids to promote uptake across the cell membrane.

(6) Non-metals accept electrons in forming anions while metals donate electrons to form cations .

(7) Adsorption of cationic polymers on target cell surfaces is rapid, dose dependent, and independent of cell type

(8) The primary conditioning ingredients are cationic surfactants, silicones, and polymers.

(9) More than a decade of research into nonviral gene delivery has yielded a number of synthetic cationic lipids and polymers with transfection activity.

(10) The functional groups of iron hydroxides may sequestrate some cations and anions.