Atomic Numbers

Questions (2)

1) What is the atomic # for selenium?34 2) Write the full electron configuration for selenium following the (n+l) rule? I am not
1. 4 answers
2. asked by Hannah
3. 6,243 views
Given the following Unknown atoms with their respective atomic numbers,X; Atomic number 19, Y; Atomic number 15, a. Deduce the
1. 2 answers
2. asked by bliss
3. 544 views