Periodic Trends

Front

What is the group of elements that includes bromine?

Back

Bromine is a halogen.

Front

Which element has a full outer energy level?

Back

Noble gases have full outer energy levels.

Front

What are the two most reactive families on the periodic table?

Back

The two most reactive families are Halogens and Alkali metals.

Front

Define atomic radius.

Back

Atomic radius is the distance between the nucleus of an atom and the outermost energy level of electrons.

Front

How many energy levels does an atom of chlorine have?

Back

An atom of chlorine has 3 energy levels.

Front

What is the significance of the periodic table's groups?

Back

Elements in the same group have similar chemical properties due to having the same number of valence electrons.

Front

What trend is observed in atomic radius as you move down a group in the periodic table?

Back

Atomic radius increases as you move down a group due to the addition of energy levels.

Front

What trend is observed in atomic radius as you move across a period from left to right?

Back

Atomic radius decreases as you move from left to right across a period due to increased nuclear charge.

Front

What are valence electrons?

Back

Valence electrons are the electrons in the outermost energy level of an atom that are involved in chemical bonding.

Front

What is the relationship between ionization energy and atomic size?

Back

Ionization energy generally increases as atomic size decreases because the electrons are held more tightly by the nucleus.