Definitions
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun physics The major
stable isotope ofpotassium , 3919K, having nineteenprotons and twentyneutrons ; it amounts to over 93% of theelement innature
Etymologies
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Examples
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One of my favorite involves studies that create biological systems that lack the naturally occurring radioisotope potassium-40 and include only potassium-39.
The Linear Hypothesis James Killus 2008
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One of my favorite involves studies that create biological systems that lack the naturally occurring radioisotope potassium-40 and include only potassium-39.
Archive 2008-04-01 James Killus 2008
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Both potassium-39 and potassium-40 display identical chemical properties, since they both have 19 protons.
Reasons to Believe - 2009
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Potassium-40 weighs more than potassium-39 by 1 atomic mass unit (amu), since it has one more neutron in its nucleus than potassium-39.
Reasons to Believe - 2009
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Potassium-40 weighs more than potassium-39 by 1 atomic mass unit (amu), since it has one more neutron in its nucleus than potassium-39.
Reasons to Believe - 2009
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Both potassium-39 and potassium-40 display identical chemical properties, since they both have 19 protons.
Reasons to Believe - 2009
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