a) Hydrogen - stopped using it as it is explosive!
b) Helium - safe as not explosive!
d) Several here - Mercury, Uranium,Neptunium,Plutonium
d) Europium, Americium
e) Californium
f) Einsteinium
g) not sure on this one - discovered what exactly!
h) Curium
i) Mendelevium
j) Strontium
Perhaps you should do the missing one yourself - all you need is google and a copy of the periodic table.....
2007-09-09 10:13:34
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answer #1
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answered by Anonymous
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a) H (lightest of all), turned out to be very flammable. Check out the Hindenberg (LZ 129) fire.
b) He; not quite as light as the one above, however it is inert (cannot catch on fire, does not reach chemically with anything). Its name come from the Ancient Greek name for the Sun (helios) because it was first "discovered" in the spectrum of the sun's light.
c) Your choice: U, Np, Pu. They are consecutive in the table of elements and in the solar system. Pu still fits as an answer because when it was named, the object after which it was named (to complete the sequence) was still a planet. Some will say that U was not named after the planet, but after the god Ouranos ("husband" of Gaia, our mother Earth) in Greek mythology; but then, so was the planet.
d) Continue the above sequence: Am was discovered by the same guy who worked on Pu. It was the first element created in the United States of America, hence its name. It is used in fire detectors (in some other parts of the world, they sometimes use Pu which has similar properties).
Continue the sequence in the table of elements:
h) Cm (Actually, her name was Maria Sklodowska until she married Pierre. She won TWO Nobel prizes!
(skip Bk, named after a campus of the University of California; Seaborg was involved).
e) Cf (Welcome to the hotel mumble-mumble, such a lovely place... and face..., well the song has nothing to do with the element... nor the state for that matter.)
f) Es (e = mc^2)
Skip Fermi who did so much for atomic energy and for our understanding of the behaviour of subatomic particles.
i) Md (Dmitri), Great name for a course: element 101.
Many elements are neamed after places where they were discovered or created, or the birthplace of the discoverer/creator.
Francium (France), Hassium (Hesse, Germany), Dubnium (Dubya, Russia), Polonium (Poland, Marie Sklodowska's native country), Europium Berkelium, Americium, Californium, Yttrium (Ytterby, Sweden), Strontium (Strontian, Scotland, where it was discovered in 1787).
As for "dynamics", I don't know who you mean. Because most of your questions were about trans-uranic element, I thought you were afte Lise Meitner who explained the physics of atomic fission; even Einstein considered her as a genius. Yet she kept being ignored by the Nobel committee.
2007-09-09 10:13:59
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answer #2
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answered by Raymond 7
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a) Hydrogen
b) Helium
c) Mercury, Uranium(Uranus),Neptunium(Neptune),Plutonium(Pluto)
d) Americium ( America - An actinide Atomic No. 95)
e) Californium (California - An actinide Atomic No. 98)
f) Einsteinium ( Einstein - An actinide Atomic No. 99)
g) Meitnerium (An actinide Atomic No. 109)
h) Curium (Curie - An actinide Atomic No. 96)
i) Mendelevium (Mendeleev - An actinide Atomic No. 101)
j) Strontium (Strontian, a village in the highlands of Scotland, in the Ardnamurchan district, - An alkaline Earth Metal (Grp 2) Atomic Number 38)
2007-09-09 10:20:09
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answer #3
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answered by lenpol7 7
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a) and b) Helium
c) Mercury (could be Neptunium or Uranium too?)
d) Americium or Europium
e) Californium
f) Einsteinium
g) Not 100% sure but I think Metnerium after Lise Meitner
h) Curium
i) Mendelevium
j) Strontium
2007-09-09 10:08:39
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answer #4
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answered by fed up woman 6
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A) Hydrogen
B) Helium
C) Uranium (after Uranus)
Neptunium (after Neptune)
Plutonium (after Pluto)
D) Americium (after America)
E) Californium
F) Einsteinium (seriously atomic number 99)
G)
H)Curium (After Marie Curie Number 96)
I) Madelevium (number 101)
J)
Sorry can't help on G or J
2007-09-09 10:17:28
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answer #5
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answered by hersheba 4
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You aren't looking for one element; you're looking for ten!
Get a periodic chart (in your chemistry book) and I will give
you their atomic numbers and you can easily look them up.
(a) 1 (b) 2 (c) 80, 92, 93, or 94 - take your pick
(d) 63 (e) 98 (f) 99 (g) ?? (h) 96 (i) 101 (j) 38
Sorry I couldn't find anything for (g), but I looked at a list
of all elements up to 103 and found nothing. Maybe it
is one of the more recently named elements.
Hope the rest of the information is of help.
2007-09-09 10:26:47
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answer #6
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answered by Reginald 7
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a) Hydrogen, changed to Helium after several accidents.
b) Helium
c) Mercury
d) Americum
e) Californium
f) Einsteinium
g) ??
h) Curium
i) Mendelevium
j) Strontium ??
2007-09-10 10:23:00
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answer #7
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answered by tomsp10 4
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a) Hydrogen
b) Helium
c) Uranium
d) Americium
e) Californium
f) Einsteinium
g) ?
h) Curium
i) Mendelevium
j) ?
2007-09-09 11:11:40
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answer #8
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answered by Anonymous
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Surely you mean THESE elements, but I will have a go at answering your question!
a) Hydrogen
b) Helium
c)Mercury
d)Europium or Americium
e) Californium
f) Einsteinium
g)Afraid I don't know!
h) Curium
i) Mendelevium
j) Again, I don't know!
2007-09-09 21:26:00
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answer #9
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answered by xenonvalkyrie 6
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Heyy! I think i can help! =]
a) hydrogen
b) helium
c) plutonium
d) europium
e) californium
f ) einsteinium
g) nobelium or meitnerium
h) curium
i) mendelevium
j) stronium
Next time check the periodic table first coz thats were i got most of my answers!! =D
2007-09-10 05:19:15
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answer #10
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answered by Anonymous
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