Periodic Law & Periodic Trends

Flashcards about Periodic Law and Periodic Trends

Periodic Law:

If you put the elements in order by atomic number, a recurring pattern of properties are seen.

Reactivity =

A measure of how likely a substance is to be involved in a chemical reaction.

Francium is the .

The most reactive metal.

Fluorine is the .

The most reactive non-metal.

Atomic Radius =

A measure of the size of an atom.

Trend: Atomic Radius

As you go down the periodic table, atoms get .

Trend: Atomic Radius

As you go left to right in a period, atoms get .

Ionic Radius vs. Atomic Radius:

Metal ions are smaller than metal atoms.

Ionic Radius vs. Atomic Radius:

Non-metal ions are larger than non-metal atoms.

First Ionization Energy =

The amount of energy required to remove an electron from an atom.

Coulomb’s Law:

The attraction between opposite charges decreases with increased distance between them

Electron Affinity:

Amount of energy in kJ/mol released when an atom gains an electron OR ability to capture electrons.

Electronegativity =

Same concept as electron affinity, measured on a scale from 0 to 4.

is highest in Electronegativity.

Fluorine