Principal quantum numbers-chemistry?
What is the principal quantum number of the s and p valence electrons in the following chemical elements? (Enter your answer with integers separated by commas and with no spaces, for example 3,4,1,2,2,1). A) silicon 
chlorine C) beryllium D) helium E) strontium F) neon.
Comments
You can just read this off the periodic table. Why don't you try studying, instead of getting me to baby feed your homework answers to you.
The principle quantum number for the valence s and p orbitals is simply the row that the elements are in. Si is in row 3, answer the rest yourself.
The configuration ought to be 2, a million, 0, +a million/2. Your first type is the thought potential factor, this is two for Carbon. The 2d type represent the type of orbital, 0 being an S orbital, a million being P, 2 being D, etc. The 0.33 type represent the suborbital the valence electron is placed in. The sub orbitals are labelled via applying the unfavourable to sensible intiger of the orbital type, so a P orbital has a -a million, 0, and +a million suborbital, on an same time as a D orbital has a -2, -a million, 0, +a million, and +2 suborbital. Make adventure? Carbon's valence electron is the 2d indoors the P orbital, and in accordance to Hund's rule, electrons ought to fill unfilled suborbitals till now they pair up. the 1st electron will fill the 1st spin indoors the -a million suborbital, and the 2d electron will fill the 1st spot indoors the 0 suborbital. That 2d electron is the 1st indoors the suborbital, so it has a +a million/2 magnetic spin type. Quantum type instruments are very complicated, and that i'm hoping I helped you and did no longer confuse you much extra beneficial appropriate.