spin of a electron

posted by .

I have to know the spin of a electron and what I have in my notes has me confused.

1. If the # of neutrons and # protons of a element are odd the element has a whole spin # (1, 2, 3)

examples given:

2 H
11 B
14 N
17 O
33 S
35 Cl

(I think those are mass numbers not atomic #'s)

for the oxygen and sulfur I'm confused since I know that the number of protons is the atomic number which cannot be changed even if it is a isotope but for oxygen the atomic # is 8 and that is NOT a odd number and for sulfur the atomic # is 16 which would make the protons it has 16 so how is that odd?

basically:

B=> given mass: 11
atomic # :5
number of neutrons => 11-5= 6 (not a odd number)

Cl=> given mass: 35
atomic #= 17
number of neutrons => 35-17= 18 (again not odd)

I do not understand what they mean or is there a typo??

  • spin of a electron -

    I think they mean the nuclear spin here.

  • spin of a electron -

    But even if it is the nuclear spin I don't understand how the protons and neutrons #'s are odd when they are clearly even.

  • spin of a electron -

    Figuring the spin of an electron is really quite simple. In your notes, I believe you're confusing finding the number of neutrons with the spin.

    The spin is either +1/2 or -1/2. You can think of this as clockwise and counterclockwise.

    The periodic table is broken up into four sections. The two groups on the left, the ones in the middle, the six groups on the right, and the ones below.

    For any given section, the elements in the left half have a spin of +1/2. Those in the right half have a spin of -1/2.

    For example, in the S block (the two groups on the left)... H, Li, Na, K, Rb, Cs, and Fr all have a spin of +1/2. On the other hand, He, Be, Mg, Ca, Sr, Ba, and Ra all have a spin of -1/2.

    You can apply this to the other sections, too... the Boron group, the Carbon group, and the Nitrogen group all have a spin of +1/2 because they're on the left. The Oxygen group, the halogens (Fluorine group), and the noble gases (Neon group) all have a spin of -1/2.

  • spin of a electron -

    Actually I'm doing organic chemistry and according to a ppt slide C 12 has no spin and O 16 has none either.

    I'm basically looking at whether or not they will have a reading in NMR.

    The reason the oxygen has a spin in this case is because it's a isotope of O 16 and in this case is O 17.

    Can anyone who knows about nuclear spin help me out with this please.

  • spin of a electron -

    Oh, sorry about that. :)

  • spin of a electron -

    The spins of the protons neutrons will pair up antiparallel, so, they all cancel out unless there is an "odd one out". If you have an odd number of neutrons + protons, then the spin is
    hbar/2, otherwise it is zero.

  • spin of a electron -

    Okay then thanks Count Iblis

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Science

    1. Which statement about subatomic particles is NOT true?
  2. chemistry

    Calculate the angle which the spin angular momentum of a single electron forms with the z axis in alpha and beta spin states. What are the possible angles of the spin angular momentum for a two-electron triplet state
  3. Chemistry

    I have to write a bunch of atomic symbol for these isotopes and I don't understand how to I do it. (a) atomic number=53, number of neutrons=79 I looked at the periodic table for 53 so the element is Iodine. So They gave the atomic …
  4. Science-Periodic Table

    describe how to verify the # of electrons in the ion of an element. Can you please correct some of my wordings in here. I don't really get how to explain it. You look at the atomic number which is the same number of protons as electrons; …
  5. chemistry

    Isotopes (select one or more): are chemicals that react only with protons. for an element have the same chemical properties. are atoms of an element that differ in the number of protons. are atoms of an element that differ in the number …
  6. Chemisty

    Answer the questions below for an element that has the electron configuration 1s2 2s2 2p6 3s2 3p3. A. What is the symbol for this element?
  7. Chemisrty

    Answer the questions below for an element that has the electron configuration 1s2 2s2 2p6 3s2 3p6 4s1. A. What is the symbol for this element?
  8. Chemistry

    Element X has the highest first electron affinity in its period; the ground state electron configuration of it's most common ion is [Kr] 5s^2 4d^10 5p^6 a Element Y is the second largest element in it's period; it's valence electrons …
  9. Chemistry

    1) The letter "p" in the symbol 4p^3 indicates the ___. A) spin of an electron B) orbital shape*** C) principal energy level D) speed of an electron 2) If the spin of one electron in an orbital is clockwise, what is the spin of the …
  10. Chemistry

    Element x has the highest first electron affinity in its period, the ground state electron configuration of its common is: [Kr] 5s2 4d10 5p6 Element Y is the second largest element in its period; its valence electron are in orbital(s) …

More Similar Questions