Question

In all elements in a group, the thing that is the same is the: (1 point)
Responses

Number of protons
Number of protons

Number of electrons
Number of electrons

Number of electrons in the valence shell
Number of electrons in the valence shell

Number of neutrons

Answer 1

Number of electrons in the valence shell — elements in the same group have the same number of valence electrons, which gives them similar chemical properties.