Period # versus Group #

Front

What is the definition of a Period in the periodic table?

Back

A Period is a horizontal row in the periodic table that indicates the number of main energy levels (shells) of an atom.

Front

What is the definition of a Group in the periodic table?

Back

A Group is a vertical column in the periodic table that indicates elements with similar chemical properties and the same number of valence electrons.

Front

How can you determine the Period number of an element?

Back

The Period number of an element corresponds to the highest principal energy level that is occupied by electrons in its atomic structure.

Front

How can you determine the Group number of an element?

Back

The Group number of an element is determined by the number of valence electrons in its outermost shell.

Front

What is the maximum number of electrons that can occupy a single energy level?

Back

The maximum number of electrons in an energy level is given by the formula 2n², where n is the energy level number.

Front

What are valence electrons?

Back

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

Front

What are inner electrons?

Back

Inner electrons are the electrons that are not in the outermost shell and do not participate in chemical bonding.

Front

How many valence electrons does an element in Group 15 have?

Back

Elements in Group 15 have 5 valence electrons.

Front

How many main energy levels does an element in Period 3 have?

Back

An element in Period 3 has 3 main energy levels.

Front

What is the significance of the Period number in relation to an element's electron configuration?

Back

The Period number indicates the number of energy levels that contain electrons in an atom's electron configuration.