lect29_ch21_3pg

lect29_ch21_3pg - undergoing only one nuclear...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Belt of Stability Nuclei above the belt of stability have too many neutrons (per proton) They tend to decay by β -emission, which decreases the n/p + ratio Example e 0 1 - 120 50 120 49 Sn In + Belt of Stability Nuclei below the belt of stability don’t have enough neutrons (per proton) They tend to decay either by electron capture (for heavy elements) or positron emission (for light elements), both of these processes increase the n/p + ratio I Xe 120 53 0 1 - 118 54 + e Belt of Stability Nuclei with atomic numbers greater than 83 are all unstable. They have too many protons and neutrons. They tend to decay by α -emission He U Pu 4 2 237 92 239 94 +
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2 Radioactive Series Large radioactive nuclei cannot stabilize by
Background image of page 2
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 4
Background image of page 5
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: undergoing only one nuclear transformation. They undergo a series of decays until they form a stable nuclide (often a nuclide of lead). This example shows a series of - and -decays that start with 238 U and end with 206 Pb Other Considerations Nuclei with 2, 8, 20, 28, 50, or 82 protons or 2, 8, 20, 28, 50, 82, or 126 neutrons tend to be more stable than nuclides with a different number of nucleons. Radioactive Decay Half Life 3 Elements with intermediate masses have the highest nuclear binding energies Binding Energy per Nucleon Chain Reaction 4 Nuclear Weapons Nuclear Reactor Nuclear Power Plant 5 Nuclear Fusion...
View Full Document

Page1 / 5

lect29_ch21_3pg - undergoing only one nuclear...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online