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Bohr's Model of an Atom
Bohr's Model of an Atom - Rutherford's model had a major drawback. It could not explain why ultimately electrons did not fall into the nucleus by taking a spiral path. This was in concurrence with the electromagnetic theory that states 'if a charged particle undergoes ..
Bohr's Model of an Atom - Rutherford's model had a major drawback. It could not explain why ultimately electrons did not fall into the nucleus by taking a spiral path. This was in concurrence with the electromagnetic theory that states 'if a charged particle undergoes ..Bohr's Atomic Model
In 1913, Neils Bohr proposed a model of an atom based on the Planck's quantum theory of radiation. The basic postulates of Bohr's theory are: * An atom consists of a small, heavily positively charged nucleus around which electrons revolve in definite circula..
the hidden balance here, here we have one mole. I don't put a one in front. We just take one for granted. So, there's 1 mole of calcium carbonate. That gives us 1 mole of calcium oxide and 1 mole of carbon dioxide. So, here we have 2 mole, and here we have 1 mole. So, what's the conservation of mass if we divide by the atomic masses here? We will get 100. g of calcium carbonate and then discover that we have 56. g of calcium oxide, and 44 g of carbon dioxide. So, clearly, mass is conserved, ...
elements up to uranium. They couldn't do this before Moseley. And, he kept going. He didn't stop with this. Who else was in town in 1913 in Manchester? Niels Bohr. So, Moseley looks at these data, and he says, I wonder if I can fit these data to a line? So, he said, well, Bohr is in the building. I'll go talk to Bohr. And he says, why don't I use a Rydberg-like equation? And this is what he writes. The nu bar varies with the square of the proton number in the following manner: R, the ...
Question : And it's 2 in the first shell thingy and 8 in all the ones after that.. right?
Answer : The total number of electrons of an element is the same as its atomic number. So basically, the number of protons in each element is equal to the number of electrons so that they cancel eachother out and the element gets a neutral charge. Remember than in the 1st shell up to 2 electrons can be included. The 2nd shell can hold up to 8 electrons. The 3rd shell can hold up to 18 electrons and the 4th shell can hold up to 32 electrons. The formula to figure this out is 2(n^2) where n = the energy level. So if you want to figure out how many electrons the 5th energy shell can hold, you plug in 5 in place of n: 2(5^2) = 2(25) = 50 electrons. Now that you know that simply put the maximum number on electrons in each increasing energy level until you have used them all up... More from Yahoo Answers
Answer : The total number of electrons of an element is the same as its atomic number. So basically, the number of protons in each element is equal to the number of electrons so that they cancel eachother out and the element gets a neutral charge. Remember than in the 1st shell up to 2 electrons can be included. The 2nd shell can hold up to 8 electrons. The 3rd shell can hold up to 18 electrons and the 4th shell can hold up to 32 electrons. The formula to figure this out is 2(n^2) where n = the energy level. So if you want to figure out how many electrons the 5th energy shell can hold, you plug in 5 in place of n: 2(5^2) = 2(25) = 50 electrons. Now that you know that simply put the maximum number on electrons in each increasing energy level until you have used them all up... More from Yahoo Answers
Question : Which would release energy from carbon, fusion or fission?
In the reaction discussed, mass is changed into energy. Where precisely in the carbon atoms does this loss of mass occur?
Give the isotopic notation for radium-223.
Some ions contain more than one atom. T or F
Silver exposed to gases in the air undergoes a chemical reaction - it tarnishes, or develops a grayish film on its surface. The tarnished silver has more mass than did the untarnished silver. Why?
What is the effective..
Answer : Fission In the nucleus 88 Ra 223 True Oxygen has been added plus 2 not hydrogen-like bonds a small amount Bohr postulated discrete shells. There must not be a "blue" shell available in this atom.. More from Yahoo Answers
Answer : Fission In the nucleus 88 Ra 223 True Oxygen has been added plus 2 not hydrogen-like bonds a small amount Bohr postulated discrete shells. There must not be a "blue" shell available in this atom.. More from Yahoo Answers