The table below shows the most common prefixes and their relative magnitudes. Note that web browsers do not support use of superscripts and subscripts very well, so the notation 10^ 2 means 10 to the power of 2, or 10 squared.Similarly, the notation 10- 2 should be read as 10 to the power of -2.lways put a space between the number and unit, e.g., 203.65 m, 457 um pH: The proper method for reporting pH is to place the unit before the number (pH 7); never insert the word of between the unit and number and avoid splitting the unit and number within a sentence-they should always go together.
What elements make up the gas compounds found in the atmosphere? The atmosphere is primarily composed of Nitrogen (N2), which accounts for 78%. Oxygen follows, accounting for 20% of its volume, with argon less than 1%. The remainder is compâ¦osed of particulates and trace gases, including water vapor.
Hydrogen is easily the most abundant element in the universe. It is found in the sun and most of the stars, and the planet Jupiter is composed mostly of hydrogen. On Earth, hydrogen is found in the greatest quantities as water.It is present as a gas in the atmosphere only in tiny amounts â less than 1 part per million by volume. Any hydrogen that does enter the atmosphere quickly escapes the Earthâs gravity into outer space.n Earth, hydrogen is found in the greatest quantities as water. It is present as a gas in the atmosphere only in tiny amounts â less than 1 part per million by volume. Any hydrogen that does enter the atmosphere quickly escapes the Earthâs gravity into outer space.