On the periodic table, lithium and beryllium are in different groups. Which statement describes why the two elements are in different groups?(1 point) Responses They are different colors. They are different colors. They have a different number of electron shells. They have a different number of electron shells. They have a different number of electrons in their outer shells. They have a different number of electrons in their outer shells. They have different atomic numbers. They have different atomic numbers.
1 answer
The correct statement that describes why lithium and beryllium are in different groups is: They have a different number of electrons in their outer shells.
This is because lithium (Li) has one electron in its outer shell, while beryllium (Be) has two electrons in its outer shell. The different number of outer shell electrons is what determines the groups in the periodic table.
