PLEASE HELP ME How are the electron structures of hydrogen (H) and lithium (Li) similar?

A. They both have 1 electron in an s sublevel.
B. Neither one has any valence electrons.
C. They both have valence electrons in the 1s sublevel.
O D. They both have valence electrons in the first main energy level.

1) how many electrons are in each energy level of the following elements? a. he b. na c. na d. ne 2) how many valence electrons are percent in the following atoms? a. s b. mg c. be d. cl 3) which of the following elements are stable as atoms? a. he b. o c. cl d. ar if you are able to provide the work as to how you got the answers that would be greatly appreciated. : )

Consider the directing effects of the substituents on salicylamide and predict the possible structures of the iodination products. which do you think will be the major product?

The polymer used for the nonstick surface of cooking utensils is 24.0%c and 76%f by mass. what is the empirical formula of this polymer?