thorium

1. A radioactive silvery-white metallic element that is recovered commercially from monazite. Its longest-lived isotope, the only one that occurs naturally, is Th 232 with a half-life of 1.41 × 1010 years. It is used in magnesium alloys, and isotope 232 is a source of nuclear energy. Atomic number 90; atomic weight 232.038; approximate melting point 1,750°C; approximate boiling point 4,500°C; approximate specific gravity 11.7; valence 4. See Table at element.

2. A radioactive metallic element that is obtained especially from monazite and is usually associated with rare earths .

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Top Words by points	Points	Word Game
thorium	12	Scrabble

2 Letters	Scrabble® Points
hm	7
ut	2
um	4
uh	5
to	2
ti	2
or	2
om	4
oi	2
oh	5
mu	4
mo	4
mi	4
hi	5
ho	5
it	2

3 Letters	Scrabble® Points
ort	3
rut	3
our	3
out	3
rho	6
rim	5
rom	5
rot	3
rum	5
hom	8
hit	6
tho	6
tom	5
tor	3
tui	3
tum	5
him	8
hot	6
mho	8
mir	5
moi	5
mor	5
mot	5
mut	5
hut	6
ohm	8
hum	8

4 Letters	Scrabble® Points
omit	6
trio	4
trim	6
tour	4
tori	4
tiro	4
thru	7
thro	7
thou	7
thir	7
thio	7
hour	7
hurt	7
mort	6
trou	4
ruth	7
rout	4
roti	4
riot	4
moth	9

5 Letters	Scrabble® Points
tumor	7
humor	10
houri	8
mohur	10
thrum	10
mouth	10
routh	8
mirth	10

7 Letters	Scrabble® Points
thorium	12