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An isotope is a version of a chemical element that has the same number of protons, but a different number of neutrons. The number of protons (and corresponding electrons) is what gives an element its chemical properties; the number of neutrons changes the atom's weight and can give it additional properties such as radioactivity.
In chromium's case, there are actually 28 different isotopes, ranging from 42Cr to 67Cr; but the four most stable ones are 50Cr, 52Cr, 53Cr and 54Cr. Since chromium contains 24 protons, those four isotopes contain 26, 28, 29 and 30 neutrons respectively.
50Cr is especially interesting. It appears stable, but physicists believe, based on its properties, that it is actually radioactive; but with a half-life ten million times the lifetime of the universe so far! As a result of this extremely slow decay, nobody has ever observed an atom of chromium-50 splitting, so observation has yet to verify the math.
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How many atoms are there in one molecule of Cr(NO3)3?
Chromium(III) nitrate is not made of molecules. It is ionic. There are 4 ions in one formula of chromium(III) nitrate.
How many chromium atoms and how many oxygen atoms are indicated on the right side of this balanced chemical equation 4 Crs 3 O2g 2 Cr2O3g?
In the balanced chemical equation 4 Cr(s) + 3 O2(g) → 2 Cr2O3(g), there are a total of 6 chromium atoms (2 from Cr and 4 from Cr2O3) and 6 oxygen atoms (6 from O2 and 3 from Cr2O3) on the right side of the equation.
How many atoms in each of the elements K2CrO4?
There are 2 atoms of K, 1 of C, and 4 of O.
Two atoms are isotopes if they contain?
Isotopes are atoms of the same element which differ in the number of neutrons they contain. For example, helium-3 (3He), with two protons and one neutron in each nucleus, and helium-4 (4He), with two protons and two neutrons, are two different isotopes of helium. Nearly all elements found in nature are mixtures of several different isotopes. Although the chemical properties of isotopes of the same element are the same, the physical properties differ. The natural proportions of the isotopes are expressed in the form of an abundance ratio.
How many atom in formula Na2CrO4?
The formula Na2CrO4 contains 7 atoms: 2 sodium atoms (Na), 1 chromium atom (Cr), and 4 oxygen atoms (O).
What is the average atomic mass of X when X has four isotopes?
There are multiple elements of the Periodic Table which have 4 isotopes. These are further broken down into three which have unstable isotopes, and 6 that do not decay. The 6 that are stable are strontium (Sr), lead (Pb), cerium (Ce), iron (Fe), chromium (Cr) and sulphur (S).
Do all lithium atoms have the same mass?
No. There are different isotopes of lithium which have different numbers of neutrons and thus different masses. There are two stable isotopes of lithium: Lithium-6 with 3 neutrons and Lithium-7 with 4 neutrons.
Is a cr 125 a 4 stroke?
a cr 125 is a 2 stroke
Which of daltons 4 ideas were proven incorrect?
Dalton's idea that atoms are indivisible particles has been proven incorrect, as atoms are made up of protons, neutrons, and electrons. Additionally, his idea that all atoms of the same element are identical in mass has been disproven due to the existence of isotopes.
How many isotopes are in tin?
10 isotopes 10 isotopes
What is the oxidation number of K2CrO4?
K2CrO4 has 2x K(potassium) atoms per 1xCr (chromium) atom per 4xO (oxygen) atoms. The oxidation number of oxygen is always -2 (except when chemically bound to fluorine, which is the only element higher in electronegativity/ionization energy than oxygen) K is an alkali metal, (in column 1A of the periodic table) and henceforth will almost always have an oxidation number of +1. With this information, we can deduct that... 2 K atoms will each have +1 as an oxidation number (totaling +2) 4 O atoms will each have -2 as an oxidation number (totaling -8) We set the equation to zero (because the compound has no charge) so. 2K+Cr+4O=0 or 2(+1)+Cr+4(-2)=0 or +2+cr-8=0 simple algebra from here. cr=+6 each, individually, would be, k=+1, cr=+6, o=-2. Generally, you'll only be looking to figure out the oxidation number of cr in this problem.
Which isotopes combined during the sun's nuclear reactions and the element created?
In the sun's nuclear reactions, hydrogen isotopes combine to form helium-4. Specifically, two hydrogen-1 isotopes combine through a process called nuclear fusion to create a helium-4 atom, releasing energy in the form of gamma rays and neutrinos.
