The Periodic Table and Its Trends

In the periodic table, the ______ number matches the highest ______ quantum number, showing how many electron shells are filled.

The ______ number often matches the count of ______ electrons, which occupy the outermost shell of an atom.

Cause of atomic radius decrease across a period

Reason for atomic radius increase down a group

Effect of inner electron shells on atomic radius

As you move across a ______, the ability of an atom to attract bonding electrons, known as ______, tends to rise.

The ______ decreases when going down a group due to increased distance between the nucleus and ______ electrons, which weakens the nuclear pull.

Influence of metallic bonding on melting points

Melting points of elements with giant covalent structures

Melting points of simple molecular structures

As you move from left to right across a ______, density usually ______ until it reaches the ______, after which it tends to ______.

When descending a ______, the ______ of an element typically ______ because of additional ______ and ______.

______ like ______ and ______ differ from metals as they can ______ electricity more effectively when the ______ rises.

Periodic Table: Atomic Radius Trend