Periodic trends

Anions have a __________ charge and are larger than the atoms from which they formed.

negative

The group with the highest __________ energy is Group 18.

ionization

Cations have a __________ charge and are smaller than the atoms from which they formed.

positive

Electronegativity __________ down a group.

decreases

The number of protons __________ across a period.

increase

Ionization energy __________ down a group.

decreases

The energy to remove an electron is __________ energy.

ionization

Atomic radius __________ across a period and increases down a group.

decreases

Electronegativity __________ across a period.

increases

Ionization __________ across a period.

increases

The least electronegative elements are __________ metals.

alkali

The measure of the attraction that an atom has for electrons involved in chemical bonds is known as __________.

electronegativity

The most active metals are located in the __________ of the periodic table.

lower left-hand corner

The elements in Group 1 are known as __________ metals.

alkali

Elements in Group 17 are known as __________.

halogens

The periodic table is organized by increasing __________ number.

atomic

The __________ principle explains electron configuration within atoms.

Aufbau

An atom with a full outer electron shell is considered __________.

stable

The measure of the size of an atom is known as __________ radius.

atomic

The energy released when an electron is added to a neutral atom is called __________ energy.

electron affinity

Elements that have properties of both metals and nonmetals are called __________.

metalloids

The trend of atomic radius __________ as you move from left to right across a period.

decreases

The process of an atom gaining or losing electrons to form an ion is called __________.

ionization

A negative ion formed by gaining electrons is called __________.

anion

A positive ion formed by losing electrons is called __________.

Cation