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Isotopes
Page 3
Questions (317)
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
answer this
55 views
Which is true about stable isotopes? (1 point)
• Isotopes with more neutrons than protons are always stable. * A stable nucleus
3 answers
asked anonymously
74 views
The isotope of an atom containing 31 protons and 39 neutrons suddenly has two neutrons added to it.
What isotope is created?
3 answers
asked by
nunya
32 views
Cooper is made up of two isotopes, Cu-63 (62.9296 amu) and Cu-65 (64.9278 amu). Given Cooper's atomic weight of 63.546. what is
3 answers
asked by
Nathaniel Benson
85 views
Yttrium-90 is an important radioactive isotope used by doctors for cancer treatment. The isotope undergoes beta decay with a
1 answer
asked by
Kenzie
242 views
1. Isotopes with an unstable nucleus
are radioactive *** are extremely rare change into radioisotopes are only found in elements
2 answers
asked by
Bee
856 views
Explain how the isotopes of an element is an average mass.
1 answer
asked by
emm
286 views
What is different among isotopes of an element
4 answers
asked by
Luis
245 views
What isotope has an automic number of 50 and nuetrons number of 68?
1 answer
asked by
Faith Poston
187 views
A SAMPLE OF ANTIMONY, Ar=121.8, WAS ANALYSED AND WAS FOUND TO CONSIST OF 60% OF 121Sb AND ONE OTHER ISOTOPE. DETERMINE THE MASS
2 answers
asked by
0oooooooo0
731 views
Sam is comparing the half-life of two isotopes of uranium. The half-life of Uranium-238 is 4.5×10^9 years. The half-life of
3 answers
asked anonymously
82 views
Nitrogen is made up of two isotopes, N-14 and N-15. Given nitrogen's atomic weight of 14007, what is the percent abudence of
3 answers
asked by
Nathaniel Benson
48 views
If the average atomic mass of Br is 79.90 amu, what is the percent abundance of each of its isotopes?
How would we figure out the
1 answer
asked by
Ray
578 views
Chlorine has two Isotopes with mass number of 35&37.if the relative atomic mass is 35.5, find the percent abudance of
Cl-35(isoto
3 answers
asked by
Anonymous
615 views
Which is true about stable isotopes? (1 point)
A.) Isotopes that are naturally occurring in nature are always unstable. B.)
7 answers
asked anonymously
120 views
the common isotopes of chlorine weigh 35&37 units A.How many different mass molecules are there for dichlormethane,ch2 cl2?
B.
4 answers
asked by
nancy
505 views
Here are some half-lives for different isotopes of bismuth (Bi):
Bi-211 — 2.1 minutes Bi-212 — 60.6 minutes Bi-213 — 45.7
5 answers
asked by
jen
691 views
the isotopic abundance of C-12 and c-14 is 98% and 2% by mass respectively. what would be the no. of atoms of c-14 isotope in
3 answers
asked by
veer
865 views
indium(atomic wt.= 114.82 u ) has two naturally occuring isotopes, the predominant one from has isotopic wt. 114.9041 and
5 answers
asked by
veer
3,166 views
Which of the following statements is/are CORRECT?
1. Naturally occurring isotopes account for only a small fraction of known
3 answers
asked by
Kimberly :(
807 views
There are two naturally occurring isotopes of chlorine with ratios of 76% and 24%. One mole of PCl3 is made using a sample of
2 answers
asked by
John
909 views
Barium has 6 stable isotops (132Ba, 134Ba, 135Ba, 136Ba, 137Ba, and 138Ba) with natural abundances ranging from 0.1% for least
4 answers
asked by
John
490 views
I'm not sure how to do this.
Determine the actual ratio of 18O:16O for the following substances. a) Snow falling in Greenland at
2 answers
asked by
Dion
976 views
What is the relative atomic mass of naturally occuring copper to four decimal places when you are given 69,09% of copper-63 with
4 answers
asked by
Zanele
789 views
Hershey and Chase used the 35S isotope to label proteins. How does this isotope differ from the 32S isotope found in greatest
9 answers
asked by
joey
4,619 views
Re has two natural occuring isotopes 185 Re and 187 Re with an average atomic mass of 186.207 amu. Re is 62.60% 187Re and the
2 answers
asked by
Jimmy
1,255 views
list 2 reason why this isotope of gold- 191 would not be a good substitute for making jewelry?
1 answer
asked by
Maria
317 views
Why are some isotopes more common than others?
3 answers
asked anonymously
10 views
2. An isotope of sodium has a half-life of 15 h. A sample of this isotope has a mass of 2 g.
a. [2] Find the mass equation that
2 answers
asked by
kim
502 views
Why is deuterium oxide called "heavy water"? (1 point)
• It has extra oxygen atoms. • It has extra hydrogen atoms. • Its
3 answers
asked anonymously
54 views
Sam is comparing the half-life of two isotopes of uranium. The half-life of Uranium-238 is 4.5 × 10° years The half-life of
3 answers
asked by
Send help
24 views
Sam is comparing the half-life of two isotopes of uranium. The half-life of Uranium-238 is 4.5 × 10° years The half-life of
3 answers
asked by
Send help
87 views
Potassium has an atomic mass of 39.10amu. a sample of potassium is made up of isotopes potassium-39 (mass=38.964) and
2 answers
asked by
Skylar
824 views
Question What is true about stable isotopes?(1 point) Responses Isotopes are naturally occurring in nature and always unstable.
3 answers
asked anonymously
57 views
Sam is comparing the half-life of two isotopes of uraniumThe half-life of Uranium238 is 4.5 * 10 ^ 9 yearsThe half-life of
3 answers
asked anonymously
96 views
Naturally occurring cobalt consists of only one isotope, cobalt59, whose relative atomic mass is 58.9332. A synthetic
6 answers
asked by
Aidan
2,731 views
naturally occuring chlorine is composed of 35CL with atomic mass of 34.969 37CL with atomic mass of 36.966 the average atomic
2 answers
asked by
Alaa
717 views
A radioactive isotope(h=4.5days) was prepared. This isotope was used 14 days later when it had an activity of 6000000 Bq. What
4 answers
asked by
Stewart
471 views
Why is deuterium oxide called " heavy water"?
3 answers
asked by
I see you...
53 views
Why is deuterium oxide called " heavy water"?
Is it because it has extra hydrogen atoms?
3 answers
asked by
I see you...
81 views
Why is deuterium oxide called " heavy water"?
it has extra hydrogen atoms it has extra oxygen atoms its oxygen atoms are heavier
3 answers
asked by
I see you...
97 views
Tritium (half-life = 12.3 y) is used to verify the age of expensive brandies. If an old brandy contains only the following
5 answers
asked by
ashley
570 views
ok so i got...
the half life of carbon-14 is 5730 years, the relation c+(1/2)^ N/5730 is used to calc. the concentration, c, in
3 answers
asked by
bubb
532 views
three and 14c have different number of
isotopes of carbon 12c 13c and 14c have different number of electrons protons neutrons
2 answers
asked by
any
649 views
238/92U -- 4/2He divided by 234/90?
The element in the missing question mark is . (Use the symbol from the periodic table, not
3 answers
asked anonymously
35 views
The element in the missing box is___ . (Use the symbol from the periodic table, not the whole name.)
238/92u>4/2he+234/90____
3 answers
asked anonymously
66 views
Iodine-131 is used to treat hypo-thyroidism since it is preferentially absorbed by the thyroid and typically involves a total
2 answers
asked by
anonymous
528 views
Rubidium has 2 common isotopes, Rb 85 and Rb 87. If the abudance of Rb 85 is 70 percent and the abundance of Rb 87 is 30
7 answers
asked by
Lena
808 views
give one example of two elements that would be placed incorrecty if they were in order of their relative atomic masses. and
1 answer
asked by
sam
452 views
Isotopes of a given element have many different properties, such as mass, but the same chemical properties. Why is this?
your
1 answer
asked by
cyndi
526 views
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Parent Categories (17)
Atomic Attributes
Atomic Mass
Atomic Structure
Atoms
Atoms and Elements
Chemistry
Elements
Elements and Materials
Inorganic Chemistry
Nuclear Chemistry
Nuclear Physics
Nuclear Science
Periodic table
Radioactive Decay
Radioactivity
Science and Chemistry
Science/Chemistry