Question

which patterns are observed on the periodic table of the elements? select all that apply. (hint: there are 3 correct answers.) as you look from left to right within a period, atomic radius increases. as you look from left to right within a period, ionization energy increases. as you look from left to right within a period, electronegativity increases. as you look from top to bottom within a group or family, atomic radius increases. as you look from top to bottom within a group or family, ionization energy increases.

Explanation:

1. As you move from left - right across a period, the number of protons increases, pulling electrons closer, so atomic radius decreases, not increases.
2. Across a period from left to right, ionization energy increases because it's harder to remove an electron as the effective nuclear charge increases.
3. Across a period from left to right, electronegativity increases as the ability of an atom to attract bonding electrons increases.
4. Down a group, the number of electron shells increases, so atomic radius increases.
5. Down a group, ionization energy decreases as the outermost electrons are farther from the nucleus and easier to remove.

Answer:

B. As you look from left to right within a period, ionization energy increases.
C. As you look from left to right within a period, electronegativity increases.
D. As you look from top to bottom within a group or family, atomic radius increases.