12. Describe how each of the following are related. a. Group number and number of valence electrons
for representative elements
b. Principal energy level of valence electrons and
period number

Which position represents spring in the southern hemisphere? a) b) c) d)

Identify arrows pointing to bonding electrons. done h-0-0-h ) intro

What sources of error may have contributed to the percent yield not being 100 percent? think about things that may have led to inaccurate measurements or where mass of the product could have been lost if this experiment was conducted in a physical laboratory.