H2(g) +I2 (g) 2HI (g) All gases begin with an initial concentration of 2.0 M. When equilibrium is established, the concentration of HI is 4.8 M. What is the value of the equilibrium constant?

oxygen, selenium, tellurium, and polonium.

they're all from the same group as sulfur (group 16).

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.