Elements belonging to the same group have the same _____.
A) mass number
B) atomic number
C) number of neutrons
D) number of electrons
E) number of valence electrons

Question

Quizplus · Accepted Answer

Elements in the same group have the same number of valence electrons, which is why they exhibit similar chemical and physical properties. The other options are not true for all elements in the same group as they can have different mass numbers, atomic numbers, numbers of neutrons, and numbers of electrons in different energy levels.

Elements Belonging to the Same Group Have the Same _____