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radioactivité meaning in English

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radioactivité nom {f}

radioactivity [radioactivities]◼◼◼(emission of ionizing radiation)
noun
[UK: ˌreɪ.dɪəʊæk.ˈtɪ.vɪ.ti] [US: ˌreɪ.dɪo.ʊæk.ˈtɪ.vɪ.ti]
'Radioactivity' is a chemistry term. = Radioactivité est un terme de la chimie.

radioactivity [radioactivities]◼◼◼(radiation emitted)
noun
[UK: ˌreɪ.dɪəʊæk.ˈtɪ.vɪ.ti] [US: ˌreɪ.dɪo.ʊæk.ˈtɪ.vɪ.ti]
'Radioactivity' is a chemistry term. = Radioactivité est un terme de la chimie.

radioactivité alpha nom {f}

alpha radiation(radiation of alpha particles)
noun
[UK: ˈæl.fə ˌreɪ.dɪ.ˈeɪʃ.n̩] [US: ˈæl.fə ˌre.di.ˈeɪʃ.n̩]