Question

multiple choice question
how do the number of valence electrons and the number of occupied energy levels compare for different elements in the same group (column)?

• same valence electrons, same number of energy levels
• different valence electrons, different number of energy levels
• same valence electrons, different number of energy levels
• different valence electrons, same number of energy levels

Explanation:

Elements in the same group of the periodic table have the same number of valence electrons as they have similar chemical - reactivity patterns. As we move down a group, the number of occupied energy levels increases because each successive element has more electron shells.

Answer:

same valence electrons, different number of energy levels