Elements in the same column of the Periodic Table have similar chemical properties. So what does that mean about their valence electrons? You guessed it! Elements in the same column of the Periodic Table have the same number of valence electrons – that's why they have similar chemical properties.
Elements in the last column of the periodic table similar D. They rarely react.
How are the elements in the last column of the periodic table similar?
Similarly, in the last group (column) of the Periodic Table, all of the elements have their valence electron shells filled, so they are (for the most part) un-reactive with other elements; for this reason, we call this last group the "noble gases".
How are elements in the same column of the periodic table similar?
Each column is called a group. The elements in each group have the same number of electrons in the outer orbital. Those outer electrons are also called valence electrons. They are the electrons involved in chemical bonds with other elements.
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