Write the electron configuration of the following ions by using spdf notation: (a) Cr2 , Cr3 , Cr6 ; (b) Mo3 , Mo4 , Mo6 ; (c) Se4 , Se6 , Se2-.

Which element in the third period would you expect to have the larger atomic radius, sodium (na) or sulfur (s)? a. sodium, because it has a higher effective nuclear charge attracting electrons in fewer energy levels. b. sodium, because it has fewer protons attracting electrons in the same energy levels. c. sulfur, because it has more protons attracting electrons in more energy levels. d. sulfur, because it has a higher effective nuclear charge attracting electrons in the same energy levels.

How does concentration affect reaction rate

Tell me the iupac names of the following alcohols: