Write the expressions for the equilibrium constants of the reactions below. a. N2 + 3H2 ⇌ 2NH3

b. Br2 + H2 ⇌ 2HBr

c. CO + H2O ⇌ H2 + CO2

the number of protons in the nucleus of a given element. has slight luster and conducts electricity at high temperatures like metal.but like a nonmetal,boron is brittle and does not conduct electricity well at low temperatures. in graphite, carbon is a soft,brittle solid.it is reflective,ductile,or malleable.