That's false. It's the other way around. One light year is a distance that's a little farther than 63,000 astronomical units.
Answer: Ionization energy is the amount of energy necessary to <u>remove an electron from an atom</u>
Explanation:
Ionization consists of the production of ions, which are electrically charged atoms or molecules due to the excess or lack of electrons with respect to a neutral atom or molecule.
In this sense, ionization energy is the <u>energy necessary to separate (remove) an electron from a gaseous atom</u>, isolated and in a fundamental state. This is because <u>electrons are strongly attracted to the nucleus and it is necessary to provide energy to separate them</u>. However, where the atom always loses electrons is in the last layer, which is where the weakest electrons are attracted to the nucleus.