An unknown element with atomic weight 125.8 amu has two isotopes. One isotope has an abundance of 51.97% at 125.6 amu. Find the mass of the second isotope.A. 126 B. 100 C. 148 D. 531 E. Over 9000
Chorline exists mainly as two isotopes 35Cl and 37Cl,a) Which is more abundant?b) How do you know?c) Compute the percentage of chlorine that is the 37Cl isotope.
There are two isotopes of Y, 50Y (mass 49.972 amu, abundance 24.93%), 52Y (mass 51.966 amu). The atomic mass of Y in amu is what?
What is the average atomic mass of silicon? Given the following data, calculate the average atomic mass of silicon.isotope = Si-28amu =27.9769abundance(%) =92.18isotope = Si-29amu =28.9765abundance(%) =4.71isotope =Si-30amu =29.9738abundance(%) =3.12
What is the atomic number of an atom that has 6 protons, 6 neutrons, and 6 electrons?
The two naturally occurring isotopes of bromine are 81Br (80.916 amu, 49.31%) and 79Br (78.918 amu, 50.69%). The two naturally occurring isotopes of chlorine are 37Cl (36.966 amu, 24.23%) and 35Cl (34.969 amu, 75.77%).Bromine and chlorine combine to form bromine monochloride, BrCl.What are the masses of the four different BrCl molecules? Express the masses in atomic mass units using six significant figures, in decreasing numeric order (highest to lowest), separated by commas.
How many electrons, protons, and neutrons does nitrogen-14 have? Is it an anion or cation?
How many neutrons are present in an atom of neon isotope, Ne-22? (atomic # 10)
What are the numbers of electrons, sequentially, in each of the following ions? Ca2+, Fe2+, I-, O2- a) 20e-, 26e-, 53e-, 8e-b) 18e-, 26e-, 54e-, 8e-c) 22e-, 28e-, 52e-, 6e-d) 18e-, 24e-, 54e-, 10e-e) 20e-, 20e-, 53e-, 8e-
How many protons, neutrons and electrons does the 56Fe2+ ion have?
The naturally occurring isotopes of element X consists of the isotopes 63X, and 65X. The atomic mass of 63X is 62.9396 amu with a percent abundance of 69.17%. With an average atomic mass of X of 63.55 amu, the atomic mass of 65X is:A. 64.44 amuB. 79.18 amuC. 64.92 amuD. 65.22 amuE. 69.17 amu
Rubidium has two isotopes, rubidium-85 and rubidium-87. The atomic weight of rubidium is 85.4678 amu. If the atomic weight of rubidium-85 is 84.9118 amu which is present as 72.15% of all rubidium isotopes, what is the atomic weight of rubidium-87?A) 86.9082 amuB) 87.0054 amuC) 86.0000 amuD) 86.9563 amuE) 87.1123 amu
Three isotopes of A (Isotope 1: 85.91 amu, 35.12%, Isotope 2: 86.91 amu, abundance 7%, Isotope 3: 87.91 amu) would have the atomic mass of what?
Gallium consists of 2 isotopes. One of those isotopes is Ga-71 with a mass of 70.92 amu with an abundance of 39.892%. What is the mass number of the other isotope?
Pretend that a new element with an atomic weight of 342.38 amu was recently discovered. This element has two isotopes, the lighter of which has a mass of 340.91 amu and an abundance of 68.322%. What is the mass of the heavier isotope? A) 348.67 B) 343.29 C) 345.55 D) 342.38 E) 350.21
Which of the following are isotopes of the following atom? 35 79X(a) 35 82X(b) 38 82X(c) 36 79X(d) 3567X
Enter your answer in the provided box.Element X has two naturally occurring isotopes, 65X (isotopic mass 64.7079 amu, abundance 57.16%) and 67X (isotopic mass 66.9328 amu, abundance 42.84%). Calculate the atomic mass of element X.
Which of the following sets represents a pair of isotopes? 14C and 14N 206Pb and 208Pb O2 and O3 32S and 32S2-
Which are isotopes of each other? Check all that apply.(a) 11850X(b) 12648X(c) 12549X(d) 12252X
Gallium has two naturally occurring isotopes with the following masses and natural abundances: Part ACalculate the atomic mass of gallium. Express your answer using five significant figures.
A carbon-12 atom has 6 protons, 6 neutrons, and 6 electrons. How many protons does a carbon-14 atom have?
Which of the following pairs represent (hypothetical) isotopes? A) A and BB) A and CC) A and DD) C and D
If there are 128 neutrons in Pb-210, how many neutrons are found in the nucleus of Pb-206?
Naturally occurring magnesium contains three isotopes, 24Mg, 25Mg, and 26Mg. The exact isotopic molar masses of each and their relative abundances are listed in the table below. Using this information, determine the molar mass of magnesium.
How many protons, neutrons and electrons are there in a neutral atom of the isotope of copper named copper-63?
Part BThe astronaut then measures the abundance of magnesium on the new planet, obtaining the following result:What is the atomic mass of magnesium for this planet? Express your answer to two decimal places, and include the appropriate units.
On a mission to a newly discovered planet, an astronaut finds gallium abundances of 61.29 % for 69Ga and 39.71 % for 71Ga. What s the atomic mass of gallium for this location? The mass of 69Ga is 68.7200 amu. The mass of 71Ga is 70.9200 amu. Express your answer to two decimal places, and include the appropriate units.
Give the nuclear symbol for the isotope of gallium, Ga, that contains 40 neutrons per atom. Replace the question marks with the proper integers. If necessary, use the button that looks like two red arrows to clear your changes and return the answer box to its original state.
The element gallium has an atomic weight of 69.7 and consists of two stable isotopes gallium -69 and gallium -71. The isotope gallium -69 has a mass of 68.9 amu and a percent natural abundance of 60.4 %.The isotope gallium -71 has a percent natural abundance of 39.6 %.What is the mass of gallium -71? ___________ amu
Strontium (Sr) has four naturally occurring isotopes. The percent abundance and atomic mass of each isotope is given below. (a) Calculate the average atomic mass of naturally occurring strontium. amu (b) Calculate the formula mass of strontium oxide (SrO) in amu. (The average atomic mass of oxygen (O) = 16.00 amu.) amu
Suppose that a fictitious element, X, has two isotopes: 50X (59.015 amu) and 82X (62.011 amu). The lighter isotope has an abundance of 73.7%. Calculate the atomic mass of the element X.
How many protons, neutrons and electrons are there in a neutral atom of the isotope represented by:79Br35
Name and describe the composition of the three hydrogen isotopes. (Select all that apply.)
Be sure to answer all parts.Write the appropriate symbol for each of the following isotopes: (a) Z = 19, A = 41 (b) Z = 46, A = 106 (c) Z = 52, A = 125 (d) Z = 38, A = 88 Use the "isotope" tool to write the symbols.