11. In the modern periodic table, which of the following describes the elements with similar properties? SC 8.0 8.6)
A. They have similar atomic masses.
B. They are located in the same group.
C. They are located in the same period.
D. They have the same number of protons.

heat or electricity in the atmosphere- c.

b

explanation:

mitosis

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.

the electrical  conductivity  of asolution  of an electrolyte is measured by determining the resistance of thesolution  between two flat or cylindrical electrodes separated by a fixed distance.