When electrons are removed from an atom, the atom becomes positively charged and is referred to as a(n)

Explanation:

When an electron is removed from an atom then the atom acquires a positive charge.

Therefore, it results in the formation of a cation.

For example, calcium has atomic number 20 and its electronic distribution is 2, 8, 8, 2.

Therefore, it loses two electrons and changes into ion. Hence, a neutral atom of calcium changes into cation.

Thus, we can conclude that when electrons are removed from an atom, the atom becomes positively charged and is referred to as a cation.

the answer is na (sodium)

definition

                    entropy is a measure of the randomness or the extent of disorder of a chemical process.

                      enthalpy is a measure of the heat change of a reaction occurring at a constant pressure.

measurement units:

                        entropy is measured in joule per kelvin (jk⁻¹)   whereas enthalpy is measured in joule per mole (jmol⁻¹)

requirements:

                            entropy has no requirements or limits, and its change is measured by the division between the heat change of the chemical process and the temperature.

                              in contrast, enthalpy can only be related to the heat change of the reaction under standard conditions.