Why do elements that are in the same group of the periodic table share similar properties?
They are all metals.
They are all metals.
They are all very reactive with other elements.
They are all very reactive with other elements.
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 all have the same atomic mass.
1 answer
They all have the same atomic mass.