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Nuclear Chemistry
Page 2
Questions (343)
There have been two ways on making transuranium elements: neutron bombardment and
a)beta bombardment b)gamma bombardment
3 answers
asked by
Mark
769 views
The half life of Am-241 is 432 y. If 2.00 g of Am-241 is present in a sample, what mass of Am-241 is present after 1000.0 y?
2 answers
asked by
bekah
545 views
There are several technological applications for the transuranium elements (Z > 92). An important one is in smoke detectors,
4 answers
asked by
Michelle
2,449 views
Write a balanced nuclear equation for the positron emission of each of the following nuclei: a) arsenic-74
b) oxygen-15
3 answers
asked by
Shannon
2,796 views
An atom of ^241Am95 undergos alpha decay and produces an alpha particle. The resulting element is:
^239Am91 ^235Np93 ^241Pu94
3 answers
asked by
Anonymous
564 views
How many grams of a 250- g sample of thorium - 234 would remain after 40 days had passed?
4 answers
asked by
Divine
1,683 views
A radium-226 sample initially contains 0.112mol. How much radium-226 is left in the sample after 6400 years. The half-life of
4 answers
asked by
Gaby
1,012 views
22Na has a half-life of 951 days. How many grams of a 1.00 kg sample would be
left after 4 years?
3 answers
asked by
Samantha
323 views
the mass of cobalt-60 in a sample is found to have decreased from 0.800g to 0.200g in a period of 10.5 years. from this info
2 answers
asked by
shaleena
871 views
If 2 protons and 2 neutrons are ejected from a radium nucleus with atomic number 88 and mass number 226 which element will be
3 answers
asked by
laura
777 views
one half-life
Express your answer to three significant figures and include the appropriate units.
2 answers
asked anonymously
37 views
214^82 Ph express answer as a nuclear equation
2 answers
asked anonymously
26 views
What is the radioactive particle released in the following nuclear equation?
30St - 30Y + ? • neutron • proton • alpha
2 answers
asked anonymously
48 views
1. Write balanced equations for each of the following processes.
a. Chromium- 51, which targets the spleen and is used as a
3 answers
asked by
Sharon
2,558 views
given the following nuclear reaction 247/96 Cm-4/2 He + A/Z X what is the atomic number of the new atom?
1 answer
asked anonymously
97 views
given the following nuclear reaction 247/96 Cm-4/2 He + A/Z X what type of decay is demonstrated here
1 answer
asked anonymously
76 views
Which nucleus balances the following nuclear equation for the fission of Uranium-235.
235/92 U + 1/0 n —-> 90/38 Sr + a/z X + 2
3 answers
asked by
Tara Copper
308 views
A classified isotope has a half-life of 4 years.
What is the constant of decay? What is the equation that models this
1 answer
asked by
Mary
201 views
Ratio of neutrons to protons in lead-206 and uranium-238. In which nucleus is the ratio closer to 3:2?
1 answer
asked by
Anonymous
354 views
i have trouble with balancing nuclear equations, can someone help please?
What particle will balance the following nuclear
1 answer
asked by
hipniblet
462 views
The halflife of Phosphorus is 14.3 days, if i start with 100g how long will it take so that only 25g will be left?
One month is
3 answers
asked by
Kathy
360 views
Radioactive Carbon 14 (atomic number 6) is produced in the atmosphere when a neutron is absorbed by Nitrogen 14 (atomic number
1 answer
asked by
Jon
461 views
An isotope of radon gas, Rn-222, undergoes decay with a half-life of 3.8 days. How long does it take for the amount of Rn-222 to
3 answers
asked by
Makaylah
843 views
The reaction between two hydrogen isotopes is shown below:
2H + 3H → 4He + n + energy released The energy released in this
3 answers
asked by
MM
1,355 views
14C has a half-life of 5,730 years. If we start with 70 grams of 14C at time zero how many grams of14C will be left after three
2 answers
asked by
sarah
724 views
In my homework example, it says that there are 234 nucleons (140+94) bound in the products of this reaction:
n-1 + U-235 --->
1 answer
asked by
Kat
332 views
The half-life of uranium-235 is 700,000,000 years. The half-life of uranium-238 is 4.463×1011 years longer. What is the
3 answers
asked anonymously
100 views
Neptunium 239
93 Np has a decay constant of 3.40 ×10-6 s-1. A 3.0-mg sample of Np-239 is prepared. The activity of the Np-239
4 answers
asked by
jay
494 views
Which statement best explains why mass is not conserved in a nuclear change?(1 point)
Responses Some of the atoms are lost in the
3 answers
asked by
dully
50 views
Although most natural potassium nuclei are stable 39K (93.3%) or 41K (6.7%) nuclei, about 0.0117% are radioactive 40K nuclei,
2 answers
asked by
Anonymous
845 views
If a sample contains 50g of carbon14 and 50g nitrogen14 how many half lives has it undergone?
2 answers
asked by
Deb
1,208 views
The radioactive element has a half-life of about 28 years and sometimes contaminates the soil. After 47 years, what percentage
3 answers
asked by
Taylor
633 views
The activity of a sample of 35(upper#) 16(lower#)Sulfer (T 1/2= 7.55x10^6 s) is 2.51x10^5 decays per second.
WHat is the mass of
1 answer
asked by
Leila
327 views
A 14 gram sample of a substance that's used to preserve fruit and vegetables has a k-value of 0.1092. Find the substance's
1 answer
asked by
Tristan
683 views
Thorium-232 undergoes alpha decay and has a half-life of 1.4 * 10^10 years. How long will it take for a 1.00mg sample of
2 answers
asked by
John
599 views
The process of separating 238-U to produce material containing a higher concentration.
3 answers
asked by
Anonymous
280 views
14C has a half-life of 5,730 years. If we start with 70 grams of 14C at time zero how many grams of 14C will be left after three
1 answer
asked by
teal
510 views
Sam is comparing the half-life of two isotopes of uranium. The half-life of Uranium-238 is 4.5 x 10^9 years. The half-life of
3 answers
asked by
.
89 views
Sam is comparing the half-life of two isotopes of uranium. The half-life of Uranium-238 is 4.5×109 years. The half-life of
3 answers
asked by
baddie💎
57 views
For the following fusion reaction, calculate the change in energy per mole.
2/1 H + 3/2 He -> 4/2 He + 1/1 H
2 answers
asked by
Anonymous
551 views
How does the nucleus change in beta-plus decay?(1 point)
Responses The mass number remains the same, and the atomic number
3 answers
asked anonymously
50 views
The half-life of uranium-235 is 700,000,000 years. The half-life of uranium-238 is 4.463×1011 years longer. What is the
3 answers
asked by
baddie💎
53 views
The half-life of uranium-235 is 700,000,000 years. The half-life of uranium-238 is 4.463×1011 years longer. What is the
3 answers
asked by
Lettuce?
135 views
1.) what is the difference between fusion and a chemical reaction? explain in one sentence.
2.) describe what happens during a
3 answers
asked anonymously
36 views
Half-life of tritium is 12.32 years.
Write decay equation as N(t) = N(subzero)e^(-rt) where t is the time in days, N(subzero) is
1 answer
asked by
Tritium
520 views
How much of a 6gram sample of silver-105m would remain after 4 minutes?
Half life=7.2 minutes
4 answers
asked by
Sarah
387 views
The amount of time it takes for half of a sample to disappear is:
a fusion b fission c half-life d nuclear chemistry
3 answers
asked by
URMUM
33 views
Compared to an ordinary chemical reaction, a fission reaction will:
a absorb a larger amount of energy. b release a smaller
3 answers
asked by
URMUM
54 views
Given the following nuclear reaction:
247/96 Cm ---> 4/2 He + a/z X Column A Column A 1. What is the atomic mass of the new
3 answers
asked by
URMUM
54 views
Given the following nuclear reaction:
224/88 Ra ----> 4/2 He + a/z X Column A 1. What is the atomic mass of the new atom?: What
3 answers
asked by
URMUM
46 views
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Parent Categories (7)
Chemistry
Physical Science
Physics
Radioactive Isotopes
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