Chemistry

Chemistry

1. Properties of sub-atomic particles

2. Isotopes

   • Isotopes are atoms of an element with the normal number of protons and electrons, but different numbers of neutrons. Isotopes have the same atomic number, but different mass numbers.
     • Isotopes can either be radioactive or non-radioactive. For example, 14C is used in radiocarbon dating to determine the age of historical objects and 99Tc is used in medical imaging.

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