Question

as you move across the periodic table, from left to right, ionization energy is ________. options: decreasing, increasing

Explanation:

Ionization energy is the energy required to remove an electron from an atom. As we move from left to right across a period in the periodic table, the atomic number increases, meaning the number of protons in the nucleus increases. This increases the effective nuclear charge experienced by the outermost electrons. With a higher effective nuclear charge, the electrons are held more tightly to the nucleus, so more energy is needed to remove an electron. Thus, ionization energy increases from left to right across a period.

Answer:

increasing