a curie of any radioactive element disintegrates at the same rate as 1 gram of natural radium
The activity (rate of decay) of Rn is expressed in units called curies .
The new tenants discovered an old irradiator containing 19 curies of cobalt-60.
The sediment around its shores blew 5 million curies of radioactive dust over 25,000 square kilometres, irradiating 500,000 people.
During that time I used to handle vials with over 5 curies (which is about 100 times more than what you inquire about) of this radioactive substance on almost daily basis.
Each generator contains up to 40,000 curies of highly radioactive material.
In 1957, there was an explosion at a waste storage facility that blew 2 million curies of radiation into the atmosphere.
By 1963, the year of my parent's marriage, the average release of beta emitters from reactor effluent was 14, 500 curies per day.
In 1983, they were fined for releasing 50,000 curies of radiation into the Irish Sea, some of which ended up on local beaches, forcing their closure.