Which of the following is not true in regard to noble gases? a. these elements have full outermost shells. b. these elements are found in the last column (group 18) on the periodic table. c. these elements tend to gain or lose electrons easily. d. these elements tend to be relatively inactive.

Ahuge (essentially infinite) horizontal nonconducting sheet 10.0 cm thick has charge uniformly spread over both faces. the upper face carries +95.0 nc/m2 while the lower face carries -25.0 nc/ m2. what is the magnitude of the electric field at a point within the sheet 2.00 cm below the upper face? (ε0 = 8.85 × 10-12 c2/n · m2)