Why is calcium (Ca) in group 2, period 4 on the periodic table? (A) Calcium, like all group 2 elements, is nonreactive and a gas at room temperature
(B) Calcium, like all period 4 elements, is nonreactive and a gas at room temperature
© Calcium, like all group 2 elements, is reactive and a solid at room temperature.
D Calcium, like all period 4 elements, is reactive and a solid at room temperature.