Why do elements that are in the same group of the periodic table share similar properties?(1 point)

Responses

They all have the same number of electrons in the outer shell.
They all have the same number of electrons in the outer shell.

They are all very reactive with other elements.
They are all very reactive with other elements.

They are all metals.
They are all metals.

They all have the same atomic mass.

1 answer

The correct response is:

They all have the same number of electrons in the outer shell.

Elements in the same group of the periodic table share similar properties primarily because they have the same number of valence electrons, which influences their chemical behavior and reactivity.