"Watch" . . . atmospheric conditions exist that could
produce tornados, but none have been seen yet.
"Warning" . . . tornados have formed and have been seen.
Answer:
The correct option is E. X(g) → X⁺(g) + e⁻
Explanation:
The electrons are attracted to the nucleus and it is necessary to provide energy to start them. Then the ionization energy is the energy necessary to pull an electron to a gaseous atom, isolated and in a fundamental state. The electrons in the last shell are the most weakly attracted to the nucleus, so these are the lost electrons.
In this way, the gaseous element is converted to a gaseous cation (positively charged ion).
Taking this definition into account, <u><em>the correct option is E. X(g) → X⁺(g) + e⁻</em></u>