Halogens Group 7A; very reactive non-metals; gain 1 valence electron to become negatively charged

Group 2A; slightly less reactive metals; lose their 2 valence electrons to become positively charged

Group 8A; non-reactive non-metals; do not lose or gain valence electrons, because they already have 2 or 8 valence electrons

Group 1A; very reactive metals; lose their 1 valence electron to become positively charged

Steam reforming of methane ( ch4) produces "synthesis gas," a mixture of carbon monoxide gas and hydrogen gas, which is the starting point for many important industrial chemical syntheses. an industrial chemist studying this reaction fills a 1.5 l flask with 3.5 atm of methane gas and 1.3 atm of water vapor at 43.0°c. he then raises the temperature, and when the mixture has come to equilibrium measures the partial pressure of carbon monoxide gas to be 1 .0 atm. calculate the pressure equilibrium constant for the steam reforming of methane at the final temperature of the mixture. round your answer to 2 significant digits.