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Antimony, Sb, has the atomic number 51. The atomic number is the number of protons in the nuclei of all antimony atoms, so Sb atoms have 51 protons. In a neutral atom, the number of protons equals the number of electrons. So Sb atoms also have 51 electrons. Antimony-121 is an isotope of antimony with a mass number of 121. From the mass number, we can subtract the number of protons and get the number of neutrons in the atoms of the 121Sb isotope, which is 121-51 = 70 neutrons.
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How many neutrons does antimony contain?
Antimony (symbol Sb) has three isotopes: 121Sb, 123Sb, and 125Sb. The 121 isotope has 70 neutrons, and the 123 isotope has 72 neutrons. The 125 isotope isn't stable and will decay, but it has 74 neutrons.
What is the density of lead with 2 percent antimony?
121.760
How many electrons are present in an atom of mercury 201?
121 neutrons.
If an atom has 80 protons and 121 neutrons and is not in an excited state how many electrons does the atom have?
80
What element has 121 electrons and can be found in the same group as Zinc?
No element with 121 electrons has yet been discovered (as of December 2016).
What is the most abundant isotope of Antimony?
Antimony-121 at 57.25%, the rest is Antimony-123
How do you calculate percent abundance for antimony?
The atomic mass of an element is the weighted average of the masses of its isotopes. You know that: Antimony-121 has a mass of 120.9038 u, x% abundance Antimony-123 has a mass of 122.9042 u, y% abundance There are only 2 isotopes for antimony and their percent abundances should add up to 100%. In other words: x% + y% = 100% y = 1-x (percentages written as decimals) So, now let's put everything together. In order to calculate the atomic mass, multiply the percent abundance of an isotope by its atomic mass; then add the product of all the isotopes: (Atomic Mass of Antimony-121)(Percent Abundance of Antimony-121) + (Atomic Mass of Antimony-123)(Percent Abundance of Antimony-123) = Atomic Mass of Element Antimony (120.9038 amu)(x) + (122.9042 amu)(y) = 121.760 amu Replacing 1-x for y gives: (120.9038 amu)(x) + (122.9042 amu)(1-x) = 121.760 amu Solve for x: 120.9038x + 122.9042 -122.9042x = 121.760 amu -2.0040x = -1.1442 x = 0.57096 = 57.096% Solve for y: y = 1 - x y = 1 - 0.57096 = 0.42904 = 42.904%
How many neutrons does antimony contain?
Antimony (symbol Sb) has three isotopes: 121Sb, 123Sb, and 125Sb. The 121 isotope has 70 neutrons, and the 123 isotope has 72 neutrons. The 125 isotope isn't stable and will decay, but it has 74 neutrons.
How many times has the river Rhine flooded?
121 121 121 121
How many meters are there in 121 kilometers?
121 km = 121 000 m
How many factors dose 121 have?
The factors of 121 are: 1, 11, 121
What is the density of lead with 2 percent antimony?
121.760
How many stones is 121?
121 pounds = 8.64285714 stones 121 kilograms = 19.0542384 stones
How many stanzas aryabhatiya has?
121 verses that is 121 stanzas
How many months is 121 days?
121 days = about 4 months.
How many numbers go into 121?
3 numbers are factors of 121. They are 1, 11 and 121 itself.
How many meters are in 121 centimeters?
121/100 = 1.21 meters
