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What is meant by radioactivity?
Question
Updated 4/19/2014 12:03:18 PM
1 Answer/Comment
Radioactivity refers to the particles which are emitted from nuclei as a result of nuclear instability.

Added 4/19/2014 12:03:18 PM
This answer has been confirmed as correct, not copied, and helpful.
an alpha partical is identical to a:
Weegy: alpha particle, positively charged particle, identical to the nucleus of the helium-4 atom, spontaneously emitted by some radioactive substances, consisting of two protons and two neutrons bound together, [ thus having a mass of four units and a positive charge of two. ] (More)
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Expert Answered
Asked 6/6/2013 5:38:20 AM
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Choose the category of connective used in the following example: He won the race easily. Nevertheless, his attitude prevented the team from being truly happy. take away or limit a preceding idea indicate order show consequence indicate repetition of an idea show space relationship
Weegy: Nevertheless, his attitude prevented the team from being truly happy. [ take away or limit a preceding idea indicate order show consequence indicate repetition of an idea (More)
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Expert Answered
Asked 6/6/2013 5:39:29 AM
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3. Proterozoic eon
Weegy: Bacteria was first formed in the Archean eon, (More)
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Updated 6/6/2013 6:25:19 AM
1 Answer/Comment
The Proterozoic Eon is the period of Earth's history that began 2.5 billion years ago and ended 542.0 million years ago. It is subdivided into three eras: the Paleoproterozoic (2.5 to 1.6 billion years ago), Mesoproterozoic (1.6 to 1 billion years ago), and Neoproterozoic (1 billion to 542.0 million years ago).

Added 6/6/2013 6:25:19 AM
Claude Bernard first recognized _____.
Question
Updated 34 days ago|3/17/2015 6:53:36 PM
1 Answer/Comment
Claude Bernard first recognized separate fluids outside and inside the cell.
Added 34 days ago|3/17/2015 6:53:34 PM
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