Greenhouse gases make up blank of Earth's atmosphere. A. between 1% and 5%
B. between 5% and 20%
C. over 20%
D. less than 1%

In the 1800s, one of the statements in john dalton's atomic theory was that atoms are indivisible. later experimental evidence led to the discovery of subatomic particles such as neutrons, electrons, and protons. what happened to the indivisible atom part of dalton's atomic theory, and why?

How many moles of carbon dioxide will form if 2.5 moles of c3h8 is burned

The number to the right of an element's symbol (ex. c-12) identifies the of an isotope.