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Helen [10]
3 years ago
15

The following atoms are all variations of the element carbon: 12C, 13C, and 14C due to differing

Chemistry
1 answer:
Katen [24]3 years ago
5 0
Isotopes. 
<span>Some isotopes of elements that are not usually radioactive are radioactive because they don't have a suitable number of neutrons. For example carbon-12 is stable but carbon-14 is radioactive. Carbon-12 is much more common.</span>
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Who was the first to propose the idea of atoms?
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1) <em>The correct answer is A. Collision</em>

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