7 - 22 Atoms and radioactivity
Electrons, protons and neutrons
●
● ***Number of protons = number of electrons in atom, otherwise is ion
● ***Isotope: atoms having same number of protons but different numbers of neutrons
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Ionizing radiation (電離輻射)
● Emitted when unstable nuclei decay at random
● Causes other atoms to gain/lose electric charge, forming ions
1
Electrons, protons and neutrons
●
● ***Number of protons = number of electrons in atom, otherwise is ion
● ***Isotope: atoms having same number of protons but different numbers of neutrons
●
Ionizing radiation (電離輻射)
● Emitted when unstable nuclei decay at random
● Causes other atoms to gain/lose electric charge, forming ions
1
