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Why does each cell have 2 copies of each gene is it because when cell dived the copy the nucleus and the genes present in the nucleus?
A copy comes from one each of the sperm and egg cell (animals). During , the genetic material is halved so that the gamete (sex cell) has half the genetic...
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How does the nucleus of a copper atom compare to the nucleus of a nickel atom?
$Ni, Z=28$ contains ONE LESS PROTON, one less positively charge massive nuclear particle, than $Cu, Z=29$. This difference in the $Z$ enables us to identify the different as copper and...
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How does the energy of an electron change when the electron moves closer to the nucleus?
Since the charges on nucleus and electron are opposite in nature, an attractive force exists between them. It is true in generally, that when objects are made to move closer...
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If an atom has 35 protons in the nucleus, how many electrons will it have orbiting the nucleus?
An atom is neutral as it has the same number of electrons that of protons. So, if an atom has 35 protons i.e. the of it is 35, then it...
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An isotope of U-235 has 92 protons in its nucleus. How many neutrons are there in the nucleus of a U-238 isotope?
We are given that $Z_"uranium"=92$...because this is the number of protons, massive, positively charged particles present ion the uranium nucleus. $Z="the atomic number"$ and it DEFINES the identity of the...
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If the spin of one electron in an orbital is spin-up, what is the spin of the other electron in that orbital?
2 electrons can occupy an orbital, and there are only 2 possibilities to the spin. One election can be "spin-up", this means that the other electron has to be...
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Why is a 3s orbital lower in energy than a 3p orbital in all atoms other than a hydrogen atom which only has a single electron?
Because of how there IS only one electron in $"H"$ atom. That single electron does not introduce orbital anguar momentum, so no matter what value of $l$, the orbital energies...
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How does a 2s orbital differ from a 2p orbital?
The 2 s and 2 p orbitals differ in shape, number, and energy. A 2 s orbital is spherical, and there is only one of them. A 2 p orbital...
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Why does an electron found in a 2s orbital have a lower energy than an electron found in a 2p orbital in multielectron systems?
The 2s and 2p orbitals have the same average distance from the nucleus. This would give them the same energy level. However the 2s orbital is a simple spherical...
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What type of orbital is used with electrons in an orbital with $l = 3$?
Think of the quantum number l as the number of nodes in the electron wave function. For l = 0, there are no nodes, so you have a single...
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