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Excited atoms are very unstable, so the excited electrons drop back down to their ground state immediately. In so doing, they release energy in the same amount that they gained, some of which is in the visible light spectrum. This is the basis of flame tests, fluorescent lights, and neon lights.
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1.8 grams of atoms of hydrogen are excited to radiations. the study of spectra indicates that 27% of atoms are in the third energy level and 15% of atoms ate in the second energy level and rest in the ground state. If the I.P. of H is $21.7*10^(-12)$erg?
1. No. of atoms present in second and third energy level (a) Calculate the number of $"H"$ atoms $"No. of H atoms" = 1.8 color(red)(cancel(color(black)("g H"))) × (1 color(red)(cancel(color(black)("mol H"))))/(1.008...
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An electron is excited from the n=1 ground state to the n=3 state in a hydrogen atom. Does it take more energy to ionize (completely remove) the electron from n=3 than from the ground state?
.........does it take you more energy to climb from the bottom of the stairs, than from 3 steps up the flight of stairs? Quite clearly it does. When...
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Atoms of which elements tend to gain electrons? Atoms of which elements tend to lose electrons?
Whether an atom gains or loses electrons is governed by two measurable quantities - ionization energy and electron affinity. Ionization energy (IE) is the energy required to remove the...
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What is the electron configuration for an excited atom of phosphorous, ready to emit a photon of energy and return to ground state? (configuration has to follow all rules except be in lowest energy)
Phosphorus has $15$. As such its electronic configuration in ground state is $1s^2 2s^2 2p^6 3s^2 3p^3$ The following electronic configurations could be excited states $1s^2 2s^2...
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Which option contains a $2*g$ mass of sodium atoms....
$1.$ $5.24xx10^22*"sodium atoms?"$
$2.$ $6.022xx10^24*"sodium atoms?"$
$3.$ $3.12xx10^23*"sodium atoms?"$
$4.$ $5.24xx10^22*"sodium atoms?"$
We know that $1*mol$ contains $6.022xx10^23$ individual sodium atoms, and has a mass of $22.99*g$. And thus for $1.$ there is a $2*g$ mass of $Na$. For $2.$ there is...
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An electron in an hydrogen atom makes a transition from the ground state, $n=1$, to the excited state, $n=5$. Calculate the energy in Joules, frequency in Hertz $(1/s)$, and wavelength in $nm$ of the photon?
Wavelength You use the Rydberg formula to calculate the wavelength, λ: $color(blue)(bar(ul(|color(white)(a/a) 1/λ = RZ^2(1/n_2^2 -1/n_1^2)color(white)(a/a)|)))" "$ where $R =$ the Rydberg constant ($1.097 × 10^7color(white)(l)...
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Why do metals tend to lose electrons and nonmetals tend to gain electrons when forming ions?
Nonmetals tend to gain electrons in order to achieve a full outer shell, so they are said to have high electronegativities. Alkaline metals, for example, would find it much...
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Using $psi_0 = ((2c)/(pi))^("1/4")e^(-cx^2)$ as the normalized ground-state wave function, find $c$, and the trial energy $E_phi$ such that $E_phi = (<< phi_0 | hatH | phi_0 >>)/(<< phi_0 | phi_0 >>) >= E_0$, where $E_0$ is the exact ground-state energy?
DISCLAIMER: Really long answer! The variational method states that from a guess wave function $phi$, we can approximate the ground-state energy for a system if we set $phi_0 =...
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Which atom in the ground state has the same electron configuration as a calcium ion, $Ca^(2+)$ in the ground state?
Electronic configuration of $""_20"Ca"$ $"1s"^2\ "2s"^2\ "2p"^6\ "3s"^2\ "3p"^6\ "4s"^2$ Electronic configuration of $""_20"Ca"^"2+"$ $"1s"^2\ "2s"^2\ "2p"^6\ "3s"^2\ "3p"^6$ Above electronic configuration is of $""_38"Ar"$ at...
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Atoms of the most reactive elements tend to have?
Fluorine and oxygen are the most reactive of , i.e. this is another way of saying that they are the most reactive of ALL ELEMENTS. Are you with me? The...
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