Elementary Charge
Contents
Key Stage 5
Meaning
The elementary charge (e) is the charge of a proton, +1.60x10^{-19} Coulombs.
About The Elementary Charge
- The W^{+} boson, π^{+} meson and K^{+} meson all carry the elementary charge (+1.60x10^{-19} Coulombs).
- The electron, W^{-} boson, π^{-} meson and K^{-} meson all carry an charge the same magnitude as the elementary charge but with the opposite sign (-1.60x10^{-19} Coulombs).
- During the weak interaction both quarks and leptons can change in charge by a magnitude of the elementary charge.
- The electronvolt is a unit of energy used for subatomic particles and can be calculated by dividing the energy in Joules by the magnitude of the elementary charge.
Subatomic Particle Charges as a fraction of Elementary Charge
Particle | Charge/e |
Proton (\(p\)) | \(+1\) |
Electron (\(e\)) | \(-1\) |
Muon (\(\mu\)) | \(-1\) |
π^{+} meson (\(\pi^+\)) | \(+1\) |
π^{-} meson (\(\pi^-\)) | \(-1\) |
K^{+} meson (\(K^+\)) | \(+1\) |
K^{-} meson (\(K^-\)) | \(-1\) |
Up-quark (\(u\)) | \(+\frac{2}{3}\) |
Down-quark (\(d\)) | \(-\frac{1}{3}\) |
Strange-quark (\(s\)) | \(-\frac{1}{3}\) |
Top-quark (\(t\)) | \(+\frac{2}{3}\) |
Bottom-quark (\(b\)) | \(-\frac{1}{3}\) |
Charm-quark (\(c\)) | \(+\frac{2}{3}\) |