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Isotopes
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Questions (317)
Hi
I am working on a question which discusses ununhexium atomic number 116 atom weight 292. This isotope undergoes 7 alpha decay
1 answer
asked by
Atom ant
503 views
can scientists actually measure the mass and relative abundance of isotopes of an element by counting each particle and
1 answer
asked by
guitarking4000
516 views
Which of the following characterizes an atomic attribute that renders certain atoms suitable for applications in nuclear
6 answers
asked anonymously
39 views
Question
Which of the following characterizes an atomic attribute that renders certain atoms suitable for applications in nuclear
1 answer
asked anonymously
45 views
Copper used in electric wires comes in two flavors (isotopes): 63Cu and 65Cu. 63Cu has an atomic mass of 62.9298 amu and an
6 answers
asked by
andrea
6,347 views
A neutral atom of potassium (K) has an average mass of 39 amu and 19 electrons. How many neutrons does it have?
a 10 b 19 c 20 d
1 answer
asked anonymously
34 views
Magnesium has three naturally occurring isotopes: Mg-24 with mass 24.3050 amu and a natural abundance of 78.99 %, Mg-25 with
6 answers
asked by
Luis
2,520 views
Copper has two naturally occurring isotopes. Cu-63 has a mass of 62.939 amu and relative abundance of 69.17%. Use the atomic
4 answers
asked by
NEED HELP
2,076 views
A nitrogen atom has 7 protons, and its most common isotope has 7 neutrons. A radioactive isotope of nitrogen has 9 neutrons.
3 answers
asked by
jesse
2,029 views
Consider the isotope arsenic-76
How many protons are in an atom of this isotope? 33 What is the mass number of this isotope? 76
3 answers
asked by
Anonymous
1,998 views
Bromine has two isotopes, Br- 79 and Br- 81. The relative atomic mass of bromine is 79.9.
CALCULATE THE PERCENTAGE of Br-79 atoms
4 answers
asked by
0oooooooo0
1,510 views
There are two naturally occurring isotopes of copper. 63Cu has a mass of 62.9296 amu. 65Cu has a mass of 64.9278 amu. Determine
3 answers
asked by
poom
1,463 views
Tritium (half-life = 12.3 y) is used to verify the age of expensive brandies. If an old brandy contains only the following
4 answers
asked by
adrienne
1,445 views
Bromine has two naturally occurring isotopes. Bromine-79 has a mass of 78.918 amu (atomic mass unit) and is 50.69% abundant.
3 answers
asked by
Zalenia
1,360 views
isotope chromium -51 has a half life of 28 days. If the original sample had a mass of 28.0 grams, what mass of chromium -51
4 answers
asked by
Andrea
1,345 views
Which element has no stalbe isotopes: 82Pb, 27Co, 51Sb or 90Th?
3 answers
asked by
Amber
1,210 views
copper has two naturally occurring isotopes. Cu-63 has a mass of 62.939 amu and relative abundance of 69.17%. Use the atomic
1 answer
asked by
Jill
1,275 views
How do carbon-12 and carbon-13 differ?
(select all that apply) they have different amount of electrons they have different amount
2 answers
asked by
malia
1,141 views
Lithium has 2 isotopes. The relative atomic masses are 6.02 and 7.02. The average relative atomic mass of lithium is 6.94. What
2 answers
asked by
Min
1,170 views
Three isotopes of Neon occur naturally:
20Ne (mass = 19.9924 amu) 21Ne (mass = 20.9938 amu) 22Ne (mass = 21.9914 amu) If the
3 answers
asked by
Karen
1,143 views
A 100-mg sample of carbon-11 has a half-life of 20.385 min. How much carbon-11 will remain after 90 min?
a) 4.687 mg b) 4.415 mg
6 answers
asked anonymously
29 views
why is a radioisotope able to substitute for an ordinary (nonradioisotope) atom of the same element in a molecule?
2 answers
asked by
Paul
1,070 views
What is used to tell different isotopes of a particular element apart?
A. the mass number B. the atomic number C. the number of
4 answers
asked by
Derrick
1,059 views
The atomic mass of copper is 63.546 amu. Do any copper isotopes have a mass of 63.546 amu? Briefly explain.
2 answers
asked by
Jenny
1,050 views
Theatomic mass of copper is 63.55.There are only two isotopes of copper , Cu-63 with a mass of 62.93 amu and Cu-65 w/ a mass of
2 answers
asked by
Anonymous
1,004 views
All isotopes of technetium are radioactive, but they have widely varying half-lives. If an 800.0 g sample of technetium-99
3 answers
asked by
Matthew
1,024 views
carbon -12 and carbon -14 are
the exact same atom isotopes of the same atom completely different atoms the same except that
2 answers
asked by
kaiya
962 views
which isotope can be used as a tracer to study the age of organic material ?
1 C-12 2 C-14 3 Tc-99 4 U-238
2 answers
asked by
Jazmin
954 views
Consider a neutral atom with 30 protons and 34 neutrons. The mass number for this atom is
2 answers
asked by
Anonymous
941 views
(b) If the natural abundance of Ag-107 is 51.84%, what is the natural abundance of Ag-109?
% (c) If the mass of Ag-107 is
4 answers
asked by
Rebekah
952 views
Iron -59 has a half -life of 45.1 days. How old is an iron nail if the Fe-59 content is 25% that of a new sample of iron? Show
6 answers
asked by
Gloria
870 views
What is the difference between carbon-13 and carbon-14?
A. the number of electrons B. the number of neutrons C. the number of
2 answers
asked by
Erica
864 views
bromine has two isotopes Br,79 and Br-81
the relative atomic mass of bromine is 79.9 calculate the percentage or br 79 atoms in a
1 answer
asked by
cake
865 views
The atomic mass of chlorine is listed as 35.454 amu on the periodic table. It has two naturally occurring isotopes, Cl-35 and
2 answers
asked by
Anonymous
878 views
Uranium-235 can be separated from U -238 by fluorinating the uranium to form UF 6 which is a gas) and then taking advantage of
2 answers
asked by
Anonymous
851 views
Isotopes of the same element always have the same
AMU number A-number Z-number Is the answer AMU number?
2 answers
asked by
Mary
993 views
On Earth, naturally occurring calcium metal contains 6 isotopes: Ca-40, Ca-42, Ca-43, Ca-44, Ca-46, Ca-48. Select all of the
2 answers
asked by
Kayte
798 views
Atom A- 6 protons, 6 electrons, 7 neutrons
Atom D- 6 protons, 6 electrons, 8 neutrons Atom X- 7 protons, 7 electrons, 8 neutrons
4 answers
asked by
timmy123
814 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
2 answers
asked by
jay
794 views
alum 27 bombarded with neutron, gamma emitted. What is isotope?
2 answers
asked by
Anonymous
773 views
Calculate the atomic mass of naturally occurring molybdenum (Mo) which
contains the following isotopes. Isotope Abundance (%)
2 answers
asked by
Sara
760 views
A newly discovered element, Mysternium (Atomic symbol My) has two isotopes and an average atomic mass of 296.7286 amu. One of
3 answers
asked by
Monika
773 views
An isotope, X, of a particular element has an atomic number of 15 and a mass number of 31.
Which of the following statements are
2 answers
asked by
dillon
746 views
(b) If the natural abundance of Ag-107 is 51.84%, what is the natural abundance of Ag-109?
48.16 % (c) If the mass of Ag-107 is
1 answer
asked by
lisa
727 views
which pair of atoms represent nuclei that have the same number of neutrons?
a Co36 and Co 58 b. Mn57 and Fe 57 c. Ni 58 and Fe 57
2 answers
asked by
greeny
692 views
A 25.40 g sample of water containing tritium,(3/1)H , emits 1450 beta particles per second. Tritium is a weak beta emitter, with
2 answers
asked by
Steven
729 views
Naturally occurring copper is a mixture of two isotopes. One of these has 34 neutrons the other has 36. If the relative atomic
5 answers
asked by
Rose
730 views
Naturally occurring cobalt consists of only one isotope Co59 whose relative atomic mass is 58.9332. A synthetic radioactive
6 answers
asked by
Candace
722 views
Relative abundance of H-2 (deuterium) is 0.015% and O-18 is 0.20%. Calculate the number of D2O18 molecules in a 1mol of natural
2 answers
asked by
Ruzzle
696 views
A hypothetical element has two main iso- topes. One has a mass of 35 amu and the other has a mass of 37 amu. If the atomic
2 answers
asked by
please help
703 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