Which one among the following is not a correct statement ?

Cathode rays are streams of fast-moving, negatively charged particles known as electrons. These rays are produced in a discharge tube under low pressure and high voltage, and their properties remain consistent regardless of the gas used, indicating that electrons are fundamental constituents of all matter. While cathode rays are negatively charged, hydrogen ions (specifically the H+ ion) are formed when a hydrogen atom loses its single electron. Since a standard hydrogen atom (protium) consists of only one proton and one electron, the resulting H+ ion is essentially a bare proton. Therefore, the statement that hydrogen ions do not contain any proton is incorrect. Hydrogen ions in aqueous solutions typically exist as hydronium ions (H3O+) because they cannot exist alone.

Sources

1. [1] Science , class X (NCERT 2025 ed.) > Chapter 2: Acids, Bases and Salts > Activity 2.9 > p. 23