Google Answers: elements of atomic number <83 with no stable isotopes

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Q: elements of atomic number <83 with no stable isotopes ( No Answer, 0 Comments )

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Subject: elements of atomic number <83 with no stable isotopes
Category: Science > Physics
Asked by: haroldb-ga
List Price: $10.00

Posted: 08 Mar 2006 03:07 PST
Expires: 08 Mar 2006 03:11 PST
Question ID: 704861

Why are technetium (atomic no. 43) and promethium (61) alone among the
elements of atomic number less than 83 in having no stable isotopes?
Do they have an 'unstable' number of protons in their nuclei?

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