What is he lightest elemant that is not a gas?

How does the brain play into mindset? When temperature equals dew point water vapor condenses back into water. What is the relative humidity? How long do quasars last? Who first used the word environment? How do you get crescent moon? Which muscle of the medial compartment of the thigh does not insert onto the linea aspera of the femur? Why are most biodiversity hotspots located in the tropics? What is discretionay time? How can a star be extremely hot like alpha canis major is but give off so little light? How many inches is 100 meters? What is an y-pb-pr input? What city is Krakatoa in? What does the citrate utilization test determine? Is latitude the distance north or south of the equator true false? How does mass affect the time it takes to reach terminal velocity? How fast are you going? If the outside fan of your air conditioner stops running in the heat of the day and works when the sun goes down and temperatures fall is it a symptom of something getting ready to fail? Can cornstarch dissolve in water? What is male phenotypes? How did Hersey and chase help build our understanding of genetics?