Elements in the same period in the periodic table have the same?
A
number of shells
B
atomic number
C
chemical properties
D
physical properties
Verified Correct Answer: A.
Chemical Principles & Mechanism
Elements within the same group have the same number of electrons in their valence (outermost) shells, and they have similar electron configurations. They exhibit similar chemical properties.
But elements in the same period can determined by the same number of shells.
Source: WAEC / JAMB / NECO Classroom Archive (Record #4471)