Question

1. as you move from left to right across a period on the periodic table, what happens to ionization energy?

it decreases.
it increases.
it increases then decreases.
it stays the same.
clear all

Explanation:

To determine the change in ionization energy across a period (left to right) in the periodic table, we recall the periodic trend: as we move left to right across a period, the atomic number increases, meaning the number of protons in the nucleus increases. This increases the nuclear charge, pulling the valence electrons closer to the nucleus. As a result, more energy is required to remove an electron (ionization energy), so ionization energy generally increases across a period.

Answer:

The option "It increases." (the second option with the corresponding radio button)