One curie, a common (though non-SI) unit of radioactivity, is defined as?

Please wait…

1. One curie, a common (though non-SI) unit of radioactivity, is defined as?

3 × 10¹⁰ disintegrations per second

3.7 × 10⁷ disintegrations per second

5 × 10⁷ disintegrations per second

3.7 × 10¹⁰ disintegrations per second

 Loading…

 

A curie was originally defined to match the activity of one gram of radium, equal to precisely 3.7 × 10¹⁰ disintegrations every second.