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What causes the bends?

“Divers get the bends when nitrogen dissolved in their blood forms bubbles because they rise to the surface too quickly.”

Reference: Divers Alert Network

What saturation of sulfur dioxide will cause people to cough

Sulfur dioxide is a colorless gas with a suffocating, choking odor. It is toxic to humans and concentrations as low as 8 ppm will produce coughing. Incredibly, in the Odyssey, Homer describes the burning of sulfur (formation of SO2) as a way that homes were 'fumigated'.

How much of the air is nitrogen?

About 78% of the air we breathe is nitrogen.

Who created the periodic table of elements?

Russian chemist Dmitri Mendeleev published his periodic table in 1869. He left gaps for elements that had not been discovered yet and correctly predicted their properties.

Another fact

“Divers get the bends when nitrogen dissolved in their blood forms bubbles because they rise to the surface too quickly.”

More from this shelf

What saturation of sulfur dioxide will cause people to cough

How much of the air is nitrogen?

Who created the periodic table of elements?