Difference between revisions of "CERN Member pages"
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| + | Particles | ||
| + | -wave functions with a probability of position in a given instant of time. (never know exactly where an electron is) | ||
| + | The Nucleus | ||
| + | -protons: positive electric charge (equal to absolute value of electron charge) | ||
| + | -neutrons: neutral electric charge, same mass as proton. | ||
| + | |||
| + | Quarks | ||
| + | -make up protons and neutrons | ||
| + | |||
| + | Two Kinds of Quarks | ||
| + | -Up quark | ||
| + | -charge of +2/3 | ||
| + | -Down quark | ||
| + | -charge of -1/3 | ||
| + | -Proton | ||
| + | -2 Up quark, 1 Down quark | ||
| + | -Neutron | ||
| + | -2 Down quark, 1 Up quark | ||
| + | |||
| + | Hadrons | ||
| + | -composite particles that consist of quarks | ||
| + | -ex. Protons, neutrons | ||
== Neeraj == | == Neeraj == | ||
== David == | == David == | ||
Revision as of 11:40, 13 February 2008
Contents
Use the space under your name to record your own work.
CERN Back to CERN mainpage
Melissa
Protons and neutrons are not fundamental because they are made up of things called quarks Things that are fundamental cannot be broken down into smaller pieces For every particle, there is a corresponding antiparticle or antimatter When particles and antiparticles meet they annihilate into pure energy Particles and antiparticles have opposite charges, the same mass, and are affected by gravity in the same way Why is there so much more matter than antimatter in the universe? There are 6 types of quarks: Up, down, charm, strange, top, bottom Quarks have fractional electrical charge Hadrons - composite particles of quarks : Baryons, any hadron made of three quarks; Mesons, contain one quark and one antiquark
Brenden
4 Elementary Particles: up quark, down quark, electron, and neutrino. =Electrons and neutrinos are called leptons. =For every particle there is an Anti-Particle.
Emily
From the particle adventure website:
The Standard Model rises out of thousands of years of scientific inquiry, but most of the experiments that have given rise to our current conception of particle physics have occurred relatively recently. In 1909, the prevailing theory of the atom's structure was that atoms were mushy, semi- permeable balls, with bits of charge strewn around them. This theory worked just fine for most experiments about the physical world.
Rutherford challenged this theory:
Amanda
Particles -wave functions with a probability of position in a given instant of time. (never know exactly where an electron is)
The Nucleus -protons: positive electric charge (equal to absolute value of electron charge) -neutrons: neutral electric charge, same mass as proton.
Quarks -make up protons and neutrons
Two Kinds of Quarks -Up quark -charge of +2/3 -Down quark -charge of -1/3 -Proton -2 Up quark, 1 Down quark -Neutron -2 Down quark, 1 Up quark
Hadrons -composite particles that consist of quarks -ex. Protons, neutrons
