MCAT Chemistry > Periodic Table of Elements > Trends

Periodic Table Trends

Background

MCAT Periodic Table Trends - Periodic Table

Understanding the periodic table of elements at a glance is one of the most important skills for the MCAT. It allows you to easily answer questions by understanding the layout of the elements as well as their corresponding trends and patterns for properties such as;

Electronegativity

See Electronegativity

Electron Affinity

See Electron Affinity

Atomic Radius

See Atomic Radius

MCAT Periodic Table Trends - Periodic Table Atomic Radius Trends

Atomic Radius is the relative size of an atom and based on the effective nuclear charge As Zeff increases from left to right, the result is the atomic radius also decreases from left to right across a period. This means electrons are more tightly held and thus reduces atomic radius. In each period, the largest atom is IA (alkali metals).

Moving down a group, increasing principal quantum number implies valence electrons are further away. Since Zeff decreases down a group, atomic radius likewise increases down a group because electrons are less tightly held.

Ionization Energy

See Ionization Energy

Melting Point

See Melting Point

Metallic Property

Periodic Table of Elements

Periodic Table of Elements Topics

MCAT Chemistry

Chemistry Topics