radon

1. A colorless, radioactive, inert gaseous element formed by the radioactive decay of radium. It is used as a radiation source in radiotherapy and to produce neutrons for research. Its most stable isotope is Rn 222 with a half-life of 3.82 days. Atomic number 86; melting point -71°C; boiling point -61.8°C; specific gravity (solid) 4. See Table at element.

2. A heavy radioactive gaseous element formed by the decay of radium .

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Top Words by points	Points	Word Game
rando	6	Scrabble

2 Letters	Scrabble® Points
an	2
ad	3
od	3
no	2
na	2
on	2
or	2
do	3
da	3
ar	2

3 Letters	Scrabble® Points
ora	3
oda	4
oar	3
rad	4
ran	3
rod	4
aro	3
nor	3
nod	4
dor	4
don	4
dan	4
ado	4
and	4

4 Letters	Scrabble® Points
dona	5
darn	5
orad	5
nard	5
rand	5
road	5
roan	4

5 Letters	Scrabble® Points
rando	6
radon	6
adorn	6
andro	6