Determine the identity of an unknown element x using the given table and following clues: i) element x is a solid ii) element x will bond ionically with element c in a 1: 1 ratio. iii) as a positive ion, it will have the same number of electrons as argon.

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)