Which orbital does NOT house core electrons for a bromine atom? a. 1s d. 2s b. 4p e. 3s c. 3p ANS: B DIF: Easy REF: 1.3 OBJ: Determine the number of valence and/or core electrons for an atom or ion. MSC: Remembering 2. An atom of which element would have an electron configuration of 1s 22s 22p 63s 23p 1 ? a. Al d. Si b. Ne e. Na c. B ANS: A DIF: Easy REF: 1.3 OBJ: Interpret the electron configuration and formal charge for an atom or ion. MSC: Understanding 3. Which electron configuration is correct for a carbon atom with a formal charge of −1? a. 1s 22s 22p 63s 1 d. 1s 22s 22p 63s 23p 5 b. 1s 22s 22p 3 e. 1s 22s 22p 4 c. 1s 22s 22p 5 ANS: B DIF: Easy REF: 1.3 | 1.9 OBJ: Interpret the electron configuration and formal charge for an atom or ion. MSC: Understandin