Actinium Actinide Solid Silvery-White, Radioactive Metal

Actinide Solid Soft, silvery-white radioactive metal; origin: decay of uranium, neptunium. Used in radioactive therapy (medicine). Emerald 89 12 Ac decays with a half-life of 21,77 years. 227

(a variety of the mineral beryl)

Ac 227,03 1,0 [Rn] 6d 7s

Actinium

Actinide

ray.

“aktinos”, meaning beam or beam meaning “aktinos”,

Actinium is derived from the Greek the from derived is Uraninite ores contain actinium Actinide Solid Silvery-white, radioactive metal. Uses: gas mantles, high-quality lenses, fuel in nuclear reactors. 90 tungsten arc welding Thorium is used in gas 22

Th 232,04 1,1 [Rn] 6d 7s

Thorium

Actinide

ftudr “Thor”. thunder, of

Thorium is named after the Norse god Norse the after named is Monazite is the primary source of thorium Actinide Solid Bright, silvery metal. It is a decay product of uranium-235 and has no commercial use. 91 22 Pa decays with a half-life of 32 760 years. 231

Pa 231,04 1,1 [Rn] 6d 7s

Protactinium Actinide

Proactinium

n atns (ray). “aktinos” and

re od:“rt”(first) “proto” words: Greek

is derived from the two the from derived is Protactinium Actinide Solid Silvery grey metal. Uses: atomic bombs, fuel in nuclear reactors, gives glass a yellow or green colour. 92 312 Uranium glass glowing under UV light

U 238,03 1,2 [Rn] 5f 6d 7s

Uranium

Actinide

Uranus.

is named after the planet the after named is Uranium Uranium Actinide Solid Silvery metal; decay product of uranium. Used in neutron detection instru- ments; radio-active waste. 93 412 states are different colours. states are different Solutions of ionic oxidation

Np 237,05 1,2 [Rn] 5f 6d 7s

Neptunium Actinide

Neptunium

Neptune.

is named after the planet the after named is Neptunium Actinide Solid Silvery-white metal. Used in nuclear weapons, to power heart pacemakers and space probes. 94

62 pacemaker A

Pu 244,08 1,2 [Rn] 5f 7s

Plutonium

Actinide

Plutonium wealth. means

ed h re “ploutòn” Greek The dead.

Pluto, Roman god of the of god Roman Pluto,

Plutonium is named after the planet the after named is