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A rock originally had 1500 atoms of U-235 and it now has 750 how old is it?
For a rock to have started with 1500 atoms of any element and now have 750 it has undergone radioactive decay equal to one full half life (i.e. there are half the number of atoms now than at the beginning).Uranium-235 has a half life of 7.038×108 years.As such, the rock is 7.038×108 or 703 million years old.
What is the atomic number of uranium and how many neutrons does the isotope uranium-235 have?
The atomic number of uranium is 92. The number of neutrons of the isotope uranium-235 is 143.
How many protons and electrons in uranium 235?
Uranium-235 has 92 protons and 92 electrons. This is because the number of protons in an atom is equal to its atomic number, which is 92 for uranium. The number of electrons is also equal to the number of protons in a neutral atom.
How many days of sunshine does Oklahoma get?
Oklahoma generally experiences an average of 235 days of sunshine per year.
Are radio active elements self substaining?
It depends on what you mean. If you mean, are they able to sustain radioactivity by themselves forever then, no. The radioactivity is a result of the breakdown of atoms in these elements into other atoms, fragments of atoms and various forms of energy. So when the supply of atoms capable of breaking down eliminates itself the radioactivity ceases.
Which of the following is a fusion reaction- uranium-235 absorbing a neutron and splitting into xenon-140 strontium-94 and two neutrons hydrochloric acid combining with sodium hydroxide to form NaCl?
Neither is. The uranium splitting is a fission reaction while the reaction between hydrochloric acid and sodium chloride is a chemical acid-base reaction.
What are 2 nuclear reactions?
The two main categories are (1) fusion: joining small atoms into larger atoms, such as hydrogen-1 into helium-4, and (2) fission, the splitting of certain large atoms, such as U-235.The two main categories are (1) fusion: joining small atoms into larger atoms, such as hydrogen-1 into helium-4, and (2) fission, the splitting of certain large atoms, such as U-235.The two main categories are (1) fusion: joining small atoms into larger atoms, such as hydrogen-1 into helium-4, and (2) fission, the splitting of certain large atoms, such as U-235.The two main categories are (1) fusion: joining small atoms into larger atoms, such as hydrogen-1 into helium-4, and (2) fission, the splitting of certain large atoms, such as U-235.
If the half-life of uranium 235 is 700 million years and have 64 atoms of it how many 700-million-year units of time will pass before 1 atom of uranium 235 is left?
It would take 1.4 billion years for half of the 64 atoms of uranium-235 to decay, leaving 32 atoms. Then another 700 million years would pass for half of the remaining 32 atoms to decay, leaving 16 atoms. This process continues until only 1 atom is left, which occurs after 5 half-lives or 3.5 billion years.
How many grams of copper atoms are needed to supply the same number of atoms as does 235 grams of iron?
The number of atoms in a given mass of metal may be calculated by dividing the mass by the gram atomic mass, then multiplying by Avogadro's Number. The gram atomic masses of iron and copper are 55.847 and 63.546 respectively. Since Avogadro's Number is constant, the required mass m of copper atoms can be found from the equation m/63.546 = 235/63.546, or m = 235 X (63.456/55.847), or 267 grams of copper, to the justified number of significant digits.
How many 5s in 235?
235 ÷ 5 = 47
How many shingles are in a bundle of 235?
I am not positive but if it is in a package of 235 i am pretty sure it is 235!
What happens during fission when a neutron combines with a uranium-235 atom?
When a neutron combines with a uranium-235 atom, it becomes unstable and splits into two smaller atoms (fission). This process releases more neutrons and a significant amount of energy in the form of heat. These released neutrons can go on to split other uranium-235 atoms, leading to a chain reaction.
How many kilos in 235 pounds?
There are approximately 106.6 kilograms in 235 pounds.
How many electrons does a atomic weight 235?
Uranium 235 has several isotopes but, 235 would contain 235 electrons in one atom.
What is the slowing down of neutrons to increase their probability of absorption by the atoms in uranium 235 called?
Neutron moderation
235 milliliters equals how many liters?
235 ml = 0.235 L
How many nos between 200 and 400 divisible by 235?
One: 235.
