When I carry out a reaction, I get 20.1L of product. When I calculate how much I should get, the answer is 26.6L. What is the percent yield of the reaction? Give your answer to the tenths place (1 place past the decimal).

10.5

Explanation:

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.