How many electrons can exist in the second shell surrounding an atomic nucleus?
a. 1 or 2
b. 1 to 8
c. more than 8
d. it depends on what the element is.

Astudent completes a titration by adding 12.0 milliliters of naoh(aq) of unknown concentration to 16.0 milliliters of 0.15 m hcl(aq). what is the molar concentration of the naoh(aq)? 1)5.0 m 2)0.20 m 3)0.11 m 4)1.1 m