Chemistry Chemistry Practice Problems Solutions Library

Isotopes Solutions Library

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163 solutions

Isotopes

Q. Which pair of atoms constitutes a pair of isotopes of the same element?A) 158X 157XB) 136X 126XC) 189X 178XD) 1910X 199XE) 2010X 2111X

Solved • Feb 5, 2021

Isotopes

Q. Part E. Give the nuclear symbol for the isotope of beryllium for which A = 10?Enter the nuclear symbol for the isotope (e.g., 42He).The atomic numb...

Solved • Jul 1, 2020

Isotopes

Q. Part D. Which element does X represent in the following expression: 3215X?Enter the chemical symbol of the element. Atoms are composed of three fun...

Solved • Jul 1, 2020

Isotopes

Q. Part C. What isotope has 13 protons and 14 neutrons?Enter the name of the element followed by a hyphen and the mass number (e.g., uranium-234).Atom...

Solved • Jul 1, 2020

Isotopes

Q. Part C.  Rank the following hydrogen peroxide molecules from the highest to lowest mass.Rank from highest to lowest molecular mass. To rank items a...

Solved • Jul 1, 2020

Isotopes

Q. Part B. The water found on Earth is almost entirely made up of the 1H and 16O isotopes for a formula of H2O and a molecular mass of 18.0 amu. What ...

Solved • Jul 1, 2020

Isotopes

Q. Click on the Isotopes tab. Click on yellow cells in the periodic table shown in the upper right to select various isotopes. Complete the following ...

Solved • Jun 30, 2020

Isotopes

Q. The atomic weight of copper, Cu, is listed as 63.546. Which of the following statements are untrue:Check all that apply.a. All the copper atoms hav...

Solved • Jun 30, 2020

Isotopes

Q. Which of the following is an incorrect representation for a neutral atom:a. 136Cb. 3015Pc. 6330Cud. 63Lie. 10847Ag

Solved • Jun 30, 2020

Isotopes

Q. What are the differences in the compositions of the following pairs of atomic nuclei? 2210Ne , 3818Ara) 3818Ar has eight more protons and eight mor...

Solved • Jun 30, 2020

Isotopes

Q. What are the differences in the compositions of the following pairs of atomic nuclei? 147N, 158OA) 158O has the same number of protons and the same...

Solved • Jun 29, 2020

Isotopes

Q. Which of the following pairs of atoms are isotopes of one another?54Fe, 55Fe

Solved • Jun 29, 2020

Isotopes

Q. Which of the following pairs of atoms are isotopes of one another?11B, 11C

Solved • Jun 29, 2020

Isotopes

Q. A neon isotope has a mass number of 21.How many neutrons does it contain?Express your answer in neutrons as an integer.

Solved • Jun 25, 2020

Isotopes

Q. Determine the isotope symbol that fits each description. a. 68 neutrons, 47 electrons b. mass number = 197, 79 electrons c. atomic number = 86, 136...

Solved • Jun 17, 2020

Isotopes

Q. Radioisotopes taken internally for medical reasonsa.  must be eliminated from the body slowlyb.  should be fissionable isotopesc.  are usually depo...

Solved • Jun 16, 2020

Isotopes

Q. The most abundant isotope of iron is Fe-56.a. How many protons, neutrons, and electrons are in this isotope?b. What is the symbol of another isotop...

Solved • Apr 29, 2020

Isotopes

Q. Fill in the missing information for the neutral isotopes in the table belowElement:SeMass number:7765Number of neutrons:3645Number of protons:Numbe...

Solved • Apr 29, 2020

Isotopes

Q. What are the atomic number, mass number, and symbol for the carbon isotope with 7 neutrons?

Solved • Apr 28, 2020

Isotopes

Q. Give the nuclear symbol for the isotope of phosphorus for which A = 31?Enter the nuclear symbol for the isotope  .

Solved • Apr 21, 2020

Isotopes

Q. Bromine exists naturally as a mixture of bromine-79 and bromine-81 isotopes. An atom of bromine-79 containsA. 34 protons and 35 electrons, onlyB. 3...

Solved • Nov 22, 2019

Isotopes

Q. How many protons and neutrons are there in the Fe-58 isotope?a. 26 protons and 58 neutronsb. 32 protons and 26 neutronsc. 26 protons and 32 neutron...

Solved • Sep 14, 2019

Isotopes

Q. Which isotope has the largest number of neutrons?A. phosphorus-30B. chlorine-37C. 39KD. 40ArE. calcium-40

Solved • Sep 13, 2019

Isotopes

Q. Which of the following pairs represent (hypothetical) isotopes? A) A and BB) A and CC) A and DD) C and D

Solved • Sep 12, 2019

Isotopes

Q. How many neutrons are present in an atom of neon isotope, Ne-22? (atomic # 10)

Solved • Sep 4, 2019

Isotopes

Q. If there are 128 neutrons in Pb-210, how many neutrons are found in the nucleus of Pb-206?

Solved • Sep 4, 2019

Isotopes

Q. Provide a number of protons, neutrons, and electrons for each isotope.a) Isotope 16Ob) Isotope 108Ag

Solved • Aug 30, 2019

Isotopes

Q. Find number of protons, neutrons, and electrons for each isotope.a) Isotope 207Pbb) Isotope 40Ca

Solved • Aug 30, 2019

Isotopes

Q. Which of the following sets represents a pair of isotopes? 14C and 14N 206Pb and 208Pb O2 and O3 32S and 32S2-

Solved • Aug 29, 2019

Isotopes

Q. What is the difference between Carbon 12, 13, and 14?

Solved • Aug 8, 2019

Isotopes

Q. A carbon-12 atom has 6 protons, 6 neutrons, and 6 electrons. How many protons does a carbon-14 atom have?

Solved • Aug 7, 2019

Isotopes

Q. The mass number of common krypton is 84, and its atomic number is 36. Krypton-84 has how many neutrons within each isotope?

Solved • Aug 7, 2019

Isotopes

Q. How many electrons, protons, and neutrons does nitrogen-14 have? Is it an anion or cation?

Solved • Aug 7, 2019

Isotopes

Q. The table below gives the number of protons (p) and neutrons (n) for four isotopes. (i) (ii) (iii) (iv) ...

Solved • Jan 8, 2019

Isotopes

Q. The table below gives the number of protons (p) and neutrons (n) for four isotopes.(i)(ii)(iii)(iv)p19192020n19211920Write the symbol for the isoto...

Solved • Jan 8, 2019

Isotopes

Q. Indicate the number of protons and neutrons in the following nuclei.193 Tl

Solved • Jan 8, 2019

Isotopes

Q. Indicate the number of protons and neutrons in the following nuclei.The number of protons in the nuclide 12953I

Solved • Jan 8, 2019

Isotopes

Q. For the following isotope that have missing information, fill in the missing information to complete the notation(a) 3414 X

Solved • Dec 10, 2018

Isotopes

Q. Write the following isotope in nuclide notation (e.g., " 146C")(d) francium-217

Solved • Dec 10, 2018

Isotopes

Q. Write the following isotope in nuclide notation (e.g., " 146C")(c) tantalum-175

Solved • Dec 10, 2018

Isotopes

Q. Write the following isotope in nuclide notation (e.g., " 146C")(b) copper-70

Solved • Dec 10, 2018

Isotopes

Q. Write the following isotope in nuclide notation (e.g., " 146C")(a) oxygen-14

Solved • Dec 10, 2018

Isotopes

Q. Write the following isotope in hyphenated form (e.g., “carbon-14”)(a) 2411 Na

Solved • Dec 10, 2018

Isotopes

Q. The two most common isotopes of uranium are 235U and 238U.Compare the number of protons, the number of electrons, and the number of neutrons in ato...

Solved • Nov 12, 2018

Isotopes

Q. Write symbols for the following isotopes.Z = 58 and A = 140

Solved • Oct 25, 2018

Isotopes

Q. The radioactive isotope cesium-137 was produced in large amounts in fallout from the 1986 nuclear power-plant disaster at Chernobyl, Ukraine.Write ...

Solved • Oct 25, 2018

Isotopes

Q. Hydrogen has three isotopes (1H, 2H, and 3H), and chlorine has two isotopes (35Cl and 37Cl).Tell how many protons, neutrons, and electrons 1H35Cl c...

Solved • Oct 25, 2018

Isotopes

Q. Hydrogen has three isotopes (1H, 2H, and 3H), and chlorine has two isotopes (35Cl and 37Cl).Tell how many protons, neutrons, and electrons 2H35Cl c...

Solved • Oct 25, 2018

Isotopes

Q. The isotope 3475 Se is used medically for the diagnosis of pancreatic disorders.How many protons, electrons, and neutrons does an atom of 3475 Se h...

Solved • Oct 25, 2018

Isotopes

Q. Sulfur has four naturally occurring isotopes, including 33S, 34S, and 36S. Look at the periodic table, and tell whether the fourth isotope is 32S o...

Solved • Oct 25, 2018

Isotopes

Q. What is the symbol for the isotope of 63Cu that possesses 36 neutrons?

Solved • Oct 25, 2018

Isotopes

Q. Consider an atom of 10B.(b) What is the symbol of the atom obtained by adding one proton to 10B?(c) What is the symbol of the atom obtained by addi...

Solved • Oct 25, 2018

Isotopes

Q. Fill in the gaps in the following table, assuming each column represents a neutral atom:Symbol79BrProtons2582Neutrons3064Electrons4886Mass no.22220...

Solved • Oct 25, 2018

Isotopes

Q. The nucleus of 6Li is a powerful absorber of neutrons. It exists in the naturally occurring metal to the extent of 7.5%. In the era of nuclear dete...

Solved • Oct 25, 2018

Isotopes

Q. The nucleus of 6Li is a powerful absorber of neutrons. It exists in the naturally occurring metal to the extent of 7.5%. In the era of nuclear dete...

Solved • Oct 25, 2018

Isotopes

Q. The nucleus of 6Li is a powerful absorber of neutrons. It exists in the naturally occurring metal to the extent of 7.5%. In the era of nuclear dete...

Solved • Oct 25, 2018

Isotopes

Q. The nucleus of 6Li is a powerful absorber of neutrons. It exists in the naturally occurring metal to the extent of 7.5%. In the era of nuclear dete...

Solved • Oct 25, 2018

Isotopes

Q. The explosion of an atomic bomb releases many radioactive isotopes, including strontium-90. Considering the location of strontium in the periodic t...

Solved • Oct 25, 2018

Isotopes

Q. Write the correct symbol, with both superscript and subscript, for each of the following. Use the list of elements inside the front cover as needed...

Solved • Oct 25, 2018

Isotopes

Q. Write the correct symbol, with both superscript and subscript, for each of the following. Use the list of elements inside the front cover as needed...

Solved • Oct 25, 2018

Isotopes

Q. Write the correct symbol, with both superscript and subscript, for each of the following. Use the list of elements inside the front cover as needed...

Solved • Oct 25, 2018

Isotopes

Q. Write the correct symbol, with both superscript and subscript, for each of the following. Use the list of elements inside the front cover as needed...

Solved • Oct 25, 2018

Isotopes

Q. The first atoms of seaborgium (Sg) were identified in 1974. The longest-lived isotope of Sg has a mass number of 266.How many protons, electrons, a...

Solved • Oct 25, 2018

Isotopes

Q. The element oxygen has three naturally occurring isotopes, with 8, 9, and 10 neutrons in the nucleus, respectively.Write the full chemical symbols ...

Solved • Oct 25, 2018

Isotopes

Q. The element oxygen has three naturally occurring isotopes, with 8, 9, and 10 neutrons in the nucleus, respectively.Describe the similarities and di...

Solved • Oct 25, 2018

Isotopes

Q. Gallium (Ga) consists of two naturally occurring isotopes with masses of 68.926 and 70.925 amu.Write the complete atomic symbol for each, showing t...

Solved • Oct 25, 2018

Isotopes

Q. Gallium (Ga) consists of two naturally occurring isotopes with masses of 68.926 and 70.925 amu.How many protons and neutrons are in the nucleus of ...

Solved • Oct 25, 2018

Isotopes

Q. Gallium (Ga) consists of two naturally occurring isotopes with masses of 68.926 and 70.925 amu.How many protons and neutrons are in the nucleus of ...

Solved • Oct 25, 2018

Isotopes

Q. Using a suitable reference such as the CRC Handbook of Chemistry and Physics  or http://www.webelements.com, look up the following information for ...

Solved • Oct 25, 2018

Isotopes

Q. The natural abundance of 3 He is 0.000137 %.How many protons, neutrons, and electrons are in an atom of 3 He?

Solved • Oct 25, 2018

Isotopes

Q. The natural abundance of 3 He is 0.000137 %.Based on the sum of the masses of their subatomic particles, which is expected to be more massive, an a...

Solved • Oct 25, 2018

Isotopes

Q. Each of the following isotopes is used in medicine. Indicate the number of protons and neutrons in each isotope.thallium-201

Solved • Oct 25, 2018

Isotopes

Q. One way in which Earths evolution as a planet can be understood is by measuring the amounts of certain isotopes in rocks. One quantity recently mea...

Solved • Oct 25, 2018

Isotopes

Q. One way in which Earths evolution as a planet can be understood is by measuring the amounts of certain isotopes in rocks. One quantity recently mea...

Solved • Oct 25, 2018

Isotopes

Q. Which two of the following are isotopes of the same element: 1631 X,1531 X,1632 X?

Solved • Oct 25, 2018

Isotopes

Q. (a) Which two of the following are isotopes of the same element: 3116X, 3115X, 3216X?What is the identity of the element whose isotopes you have se...

Solved • Oct 25, 2018

Isotopes

Q. Each of the following isotopes is used in medicine. Indicate the number of protons and neutrons in each isotope.phosphorus-32

Solved • Oct 25, 2018

Isotopes

Q. Each of the following isotopes is used in medicine. Indicate the number of protons and neutrons in each isotope.chromium-51

Solved • Oct 25, 2018

Isotopes

Q. Each of the following isotopes is used in medicine. Indicate the number of protons and neutrons in each isotope.cobalt-60

Solved • Oct 25, 2018

Isotopes

Q. Each of the following isotopes is used in medicine. Indicate the number of protons and neutrons in each isotope.technetium-99

Solved • Oct 25, 2018

Isotopes

Q. Each of the following isotopes is used in medicine. Indicate the number of protons and neutrons in each isotope.iodine-131

Solved • Oct 25, 2018

Isotopes

Q. In complete sentences, describe the similarities and differences between:different isotopes of an element.

Solved • Oct 25, 2018

Isotopes

Q. In a naturally occurring sample, 19.8% of boron atoms have five neutrons and 80.2% have six neutrons.What is the mass of a boron atom containing 5 ...

Solved • Oct 25, 2018

Isotopes

Q. What is the symbol (including the atomic number, mass number, and element symbol) for the carbon isotope with 7 neutrons?

Solved • Oct 25, 2018

Isotopes

Q. Enter isotopic symbols of the form X-A (e.g., C-13) for each isotope.The silver isotope with 60 neutrons

Solved • Oct 25, 2018

Isotopes

Q. Enter isotopic symbols of the form X-A (e.g., C-13) for each isotope.The silver isotope with 62 neutrons

Solved • Oct 25, 2018

Isotopes

Q. Enter isotopic symbols of the form X-A (e.g., C-13) for each isotope.The uranium isotope with 146 neutrons

Solved • Oct 25, 2018

Isotopes

Q. Enter isotopic symbols of the form X-A (e.g., C-13) for each isotope.  The hydrogen isotope with 1 neutron

Solved • Oct 25, 2018

Isotopes

Q. Uranium-235 is used in nuclear fission.Enter its symbol in the form ZAX.

Solved • Oct 25, 2018

Isotopes

Q. Lithium has two naturally occurring isotopes: Li-6 (natural abundance 7.5%) and Li-7 (natural abundance 92.5%).With circles to represent protons an...

Solved • Oct 25, 2018

Isotopes

Q. Lithium has two naturally occurring isotopes: Li-6 (natural abundance 7.5%) and Li-7 (natural abundance 92.5%).With circles to represent protons an...

Solved • Oct 25, 2018

Isotopes

Q. An isotope of an element contains 82 protons and 122 neutrons.What is the symbol for the isotope?

Solved • Oct 25, 2018

Isotopes

Q. The mole is defined as the amount of a substance containing the same number of particles as exactly 12 grams of C-12. The amu is defined as 1/12 of...

Solved • Oct 25, 2018

Isotopes

Q. Determine the number of protons and neutrons in the isotope Fe-58.

Solved • Oct 25, 2018

Isotopes

Q. Determine the number of protons and neutrons in each of the following isotopes.86222 Rn

Solved • Oct 25, 2018

Isotopes

Q. The amount of carbon-14 in artifacts and fossils is often used to establish their age.Determine the number of protons and neutrons in a carbon-14 i...

Solved • Oct 25, 2018

Isotopes

Q. The amount of carbon-14 in artifacts and fossils is often used to establish their age.Write its symbol in the form ZA X.

Solved • Oct 25, 2018

Isotopes

Q. Write isotopic symbols of the form ZA X for each isotope.the sodium isotope with 12 neutrons

Solved • Oct 25, 2018

Isotopes

Q. Write isotopic symbols of the form ZA X for each isotope.the oxygen isotope with 8 neutrons

Solved • Oct 25, 2018

Isotopes

Q. Write isotopic symbols of the form ZA X for each isotope.the aluminum isotope with 14 neutrons

Solved • Oct 25, 2018