Modern Atomic Theory - 3-3 MODERN ATOMIC THEORY ATOMS contain protons neutrons and electrons(which can also be subdivided into quarks gluons mesons

Modern Atomic Theory - 3-3 MODERN ATOMIC THEORY ATOMS...

This preview shows page 1 - 8 out of 8 pages.

Image of page 1
ATOMS contain protons, neutrons, and electrons (which can also be subdivided into quarks, gluons, mesons, muons, etc. It takes approximately 2000 electrons to equal the mass of 1 proton!
Image of page 2
SUBATOMIC PARTICLES PARTICLE: LOCATION: CHARGE: ATOMIC MASS: proton inside the nucleus + charge 1 amu neutron inside the nucleus no charge 1 amu electron outside the nucleus - charge 0 amu (electron cloud)
Image of page 3
OTHER INFO atomic mass units (amu): the approximate mass of 1 proton OR 1 neutron (Remember electrons are 1/2000 of a proton, so their amu is considered to be zero!!!) Misc: the diameter of an atom is approximately .100 - .500 nm (1 nm = 10 -9 m) electron cloud: area where you are most likely to find an atom's electrons
Image of page 4
IONS atomic number: the number of protons in an atom (discovered by Mosely) - In a neutral atom, the number of protons IS EQUAL TO the number of electrons. ions: formed when an atom gains or loses one or more electrons - if an electron is lost, the ion has a positive charge
Image of page 5
Image of page 6
Image of page 7
Image of page 8

You've reached the end of your free preview.

Want to read all 8 pages?

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern

Stuck? We have tutors online 24/7 who can help you get unstuck.
A+ icon
Ask Expert Tutors You can ask You can ask You can ask (will expire )
Answers in as fast as 15 minutes