4. which statement best describes group 1 elements as they are considered in order from top to bottom of the…

4. which statement best describes group 1 elements as they are considered in order from top to bottom of the periodic table? the number of principal energy levels increases, and the number of valence electrons increases. the number of principal energy levels remains the same, and the number of valence electrons increases. the number of principal energy levels increases, and the number of valence electrons remain the same. the number of principal energy levels remains the same, and the number of valence electrons decreases.

4. which statement best describes group 1 elements as they are considered in order from top to bottom of the periodic table? the number of principal energy levels increases, and the number of valence electrons increases. the number of principal energy levels remains the same, and the number of valence electrons increases. the number of principal energy levels increases, and the number of valence electrons remain the same. the number of principal energy levels remains the same, and the number of valence electrons decreases.

Answer

Brief Explanations:

Group 1 elements are alkali - metals. As we move from top to bottom in a group of the periodic table, the period number increases. Each new period corresponds to a new principal energy level. All elements in Group 1 have 1 valence electron. So, the number of principal energy levels increases while the number of valence electrons remains the same.

Answer:

The number of principal energy levels increases, and the number of valence electrons remain the same.