Which piece of empirical evidence is qualitative data? A. The tree is eight feet tall.
B. The soup tastes salty.
C. The bicycle speed is 12 miles per hour.
D. The water temperature is 80°F.

D

Explanation:

The water temperature is 80°F

ca has a crystalline lattice with positive ions (since it is a metal, metals are positively charged) and electrons flow freely in its structure since the ca atoms have a large nuclear radius so the electrons are not tightly held, therefore the electrons can flow freely since they are not being highly attracted by the nucleus. moreover, one of the properties of metals are that they are conductors of electricity, thus proving ca is the element.