Is it called when two or more elements joined together chemically?

What form of the ideal gas law would be used to calculate the temperature of a gas? What chemical reaction occurs during the Breathalyzer? What is a root system which has one large primary root and many secondary roots branching from the root? What modern structures serve the same purpose as the watchtowers? How many meters in 14ft by 8ft? active transport reguires? Water enters a living organism from the physical environment when? What time zone is Whistler BC Canada in? How many m is 1.8 km? Why most ancient available fossils are only 0.54 billion years old while earth evolved as early as 3.5 billion years ago? Between what planets will you find the asteroid belt? What has to happen for a disaccharide to be absorbed? How many land regions are there in NJ? What is aromatic alcohol? Why is it dangerous to use a hairdryer or radio near water even though pure water is not a good conductor of electricity? What is astronomy called in Telugu language? What is responsible for maintaining the shape of the animal cell and may allow the cell to move? What time would you arrive in Athens Greece from Chicago Ill if you left by air at 12 noon EST? 1 day on Saturn equals how many earth hours and minutes? Does meiosis take place in root tip cells?