27. what do atoms of elements that are in the same group share?\na number of protons\nb number of protons…

27. what do atoms of elements that are in the same group share?\na number of protons\nb number of protons and neutrons\nc number of valence electrons\nd number of neutrons
Answer
Brief Explanations:
Elements in the same group of the periodic table have the same number of valence electrons, which determines their chemical - reactivity and bonding behavior. Protons define the element itself and vary between different elements in a group. Neutrons can vary even within the same element (isotopes).
Answer:
C. number of valence electrons