Period Table Structure & Electrons

Chemistry 1A

Where are the most active metals located?

The bottom left.

Where are the most active nonmetals located?

The top right (excluding noble gases).

As you go from left to right across a period, the atomic size _____.

Decreases; The increased number of electrons makes the rings pull closer to the nucleus.

As you travel down a group, the atomic size _____.

Increases; There’s more rings.

A negative ion is _____ than its neutral atom.

Larger.

A positive ion is _____ than its neutral atom.

Smaller.

As you go from left to right across a period, the first ionization energy generally _____.

Increases; It’s low for metals, and high for nonmetals.

As you go down in a group, the first ionization ENERGY generally _____.

Decreases; The valence electrons are further from the nucleus, therefore aren’t pulled as strongly.

Where is the highest electronegativity found?

The upper right (Fluorine).

Where is the lowest electronegativity found?

The lower left (Francium).

The elements of group 1 are called:

Alkali metals.

The elements of group 2 are called:

Alkaline earth metals.

The elements of groups 3-12 are called:

Transition metals.

The elements of group 17 are called:

Halogens.

The elements of group 18 are called:

Noble gases.

What sublevels are filling across the transition elements?

D & F.

Elements within a group have a similar number of _____.

Valence electrons.

Elements across a period have the same number of _____.

Energy levels/rings.

A colored ion (salt) generally indicates a _____.

Transition metal.

As you go down in a group, the elements generally become _____ metallic.

More.