Ionization energy Definition and 87 Threads

Why is it that the energy required to pull an electron out of a metal surface(work function) is approximately half of the energy required to pull an electron out of the free atom(ionization energy) of the same metal (or element)? Is there any formula relating the two quantities?

1. Which one of the following configurations depicts an excited oxygen atom? a. 1s2 2s2 2p2 b.1s2 2s2 2p2 3s2 c.1s2 2s2 2p1 d.1s2 2s2 2p4 a. is out of the question c. is out of the questioin I know d. is the ground state of oxygen but how did they get 3s2 for b.? It must be b. But...

I am in grade 12 physics and we're currently doing atomic physics. So far I understand that when electrons get excited, they move on to higher energy levels by absorbing photons. Also I understand that when an electron moves from a higher energy level to a lower one, photons are emitted. But my...

Electro Negativity, Ionization Energy, and Electron Affinity... Can anyone explain these to me in normal English please? I am having a hard time understanding these concepts from the definitions given in the book and from my teacher. Thank you.

Homework Statement I1, = 786 kJ molG1 I5 = 16,091 kJ molG1 I2 = 1577 kJ molG1 I6 = 19,784 kJ molG1 I3 = 3232 kJ molG1 I7 = 23,766 kJ molG1 I4 = 4355 kJ molG1 I8 = 29,251 kJ molG1 Determine the energy required in kJ molG1 for the following process: M(g)^+ ------> M^5+(g) + 4 e...

I have had this question in the back of my mind for a while. Hydrogen has 1 proton and 1 electron, and the atom is electrically neutral. So that means that the electrical charge from the electron and the proton cancel each other out as they have equal/opposite charge. Then when you add another...

Hi all, I have been wondering how much energy does a candle produce per second. I know, that the heat energy can be measured, but what about the ionization energy? By ionization energy I mean the energy which is consumed when neutral atoms in the air are ionized. How can the amount of ions...

Why do metals generally have lower ionization energies than non-metals? I mean, doesn't ionization energy depend on the atomic radius? And the atomic radius is in turn dependent on the shell and the protons. According to these factors, the atomic radius of Sodium should be smaller than...

Homework Statement Given the atomic orbitals for a number of elements eg. neon 1s^22s^22p^6 and lithium 1s^2s^1 and phosphorus 1s^22s^2p^63s^23p^3 How would I determine which of these would have the highest first ionization energy and what is meant by first ionization energy...

i am stuck on this question and people are giving me different answers. Ok which period 3 element has the following succesive ionization energies: 1800,3000,3600,5800,13200

Find the effective nuclear charge of the outermost electron in sodium using its ionization energy. Ionization energy of sodium = 5.14 eV = 8.23e-19 J Zeff = Z - S I tried using the equation Zeff = Z - S, but when I followed all the rules, I found S = (8*0.85)+(2*1.00) = 8.8 Zeff...

Homework Statement I have an exam on Monday and do not know how to do this example problem. Use the following information to calculate the first ionization energy of Li. LiF(s) → Li+(g) + F −(g) 1050 kJ/mol LiF Li(s) + ½ F2(g) → LiF(s) −617 kJ/mol Li F2(g) → 2 F(g) 160 kJ/mol F2 Li(s) →...

Homework Statement I have an electric field that is nominally 30 kV/m, and I'm trying to figure out if nitrogen could be getting ionized in a field of that strength. The 1st ionization energy of nitrogen is 1402.3 kJ mol-1. What is the relationship between joules/mole and...

Homework Statement Estimate the energy of an electron in a hydrogen atom and hence deduce an approximate formula for the ionization energy of hydrogen. How accurate is your formula? Homework Equations Don't know but it is in the field of quantum mechanics The Attempt at a Solution...

Hi all, I would like to know what the difference between ionization, binding, atomization and cohesive energies is? Regards, Sara

Homework Statement Rewrite each of the following lists from largest to smallest value of each property: First Ionization Energy Be, P, Ne, F Homework Equations Our book says the general trend for ionization energy on the periodic table is to increase from left to right and...

Homework Statement According to the Bohr theory, what is the ionization energy of atomic hydrogen in kJ/mol? Homework Equations Bohr equation: E = (-2.18 x 10-18 J)(1/n2) The Attempt at a Solution I don't have any general idea on how to do this problem :( please help! The answer is...

Ok so I'm using the equation E= (-Z^2 x Rh)/ n^2 RH is a constant of 2.178x10^-18 I determined that the second ionization energy of He is the ionization energy of He+. If my math is right, the ionization energy is 8.712x10^-18... this is assuming n=1, as I've determined it from ground...

hey there, I am just school student and is a little bit confused with this quantum physics question. what is the difference between ionization energy and photoelectric emission? is the difference just that ionization energy is an electron removed from an atom in its gaseous state while that of...

Could we ionize He also if it has the biggest ionization energy?

First, I want to understand something. Everything I look at suggests that the ionization energy of an atom or ion is suppose to be the energy needed to remove the 'outermost electron'- which I find troubling conceptually, since they also refer to this as the one with the highest energy. Wouldn't...

Hey, I was wondering if anyone could help me out with this. I need to take the Bohr energy equation ( En= -2.178 x 10^-18) (Z^2 /n^2) and the Inoization energy equation ( IE= Einfinity - Eground state). I need to somehow modify the bohr energy equation that can be used to find the inonization...

Question: The first and second ionization energies of K are 419 kJ/mol and 3052 kJ/mol, and those of Ca are 590 kJ/mol and 1145 kJ/mol, respectively. Compare their values and comment on the differeneces. I'm thinking of two different ways of how to do this even though I think both are wrong...

A neon sign is a gas discharge tube in which electrons traveling from the cathode to anode collide with neon atoms in dicharge tube and knocks electrons off of them. As electrons return to the neon ions and drop to lower energy levels, light is given off. How fast would an electron have to be...

for the following question: a proton capatures a negative muon (mass=207me). Find the ionization energy of the atom. my problem: the answer in my textbook says to use 13.6eV for the E1 ionization energy, but why? i thougth that that value is only true for hydrogen atoms, but that question...

Which alkali metal forms preferentially an oxide rather than a peroxide or superoxide? a. Na b. Rb c. Li d. K Of the following, which element has the highest first ionization energy? a. Na b. Al c. P d. Cl Are these correct? Thanks.

Which ionization process requires the most energy? a. P(g) --> P+(g) + e- b. P3+(g) --> P4+(g) + e- c. P2+(g) --> P3+(g) + e- d. P+(g) --> P2+(g) + e- Is it b. P3+(g) --> P4+(g) + e- because this is the fourth ionization energy (which requires highest amt.)...

Which element in each of the following sets would you expect to have the highest second ionization energy? How do I figure this out? a. Na, Mg, Al b. Na, K, Fe c. Li, Be, Mg Can you help me? Thanks

This is a post-lab question for my chemistry lab but it is kind of physics too so I thought I'd post it here (the other sciences sections don't much response).. It's confusing because the questions are supposed to go along with what we are learning in the chemistry lecture, but we're behind in...

PLEASE HELP! Ionization Energy Question Hello everyone, I am having some trouble with this question. If one of you could point me in the right direction i would be really grateful. 1. Since the ionization process takes an electron from its ground state to the zero level of the energy...

Hello everybody, just wondering if anyone could point me in the right direction for this question. Please and thanks. 1) Since the ionisation process takes an electron from its ground state to the zero level of the energy scale, the ground state energy calculated for the electron of the...

i need help with this homework question I am having problems with... Explain why the first ionization energy for sodium is much smaller than the second ionization energy for sodium.

How can you find the Ionization Energy if given the charge and electron level?

Can someone please help me understand the following question? The ionization energy of the outermost electron in Li is 5.390 eV. What is the effective charge seen by the outermost electron? (Li has 2 energy levels)

When metal oxides react with water, the oxygen generally ends up as the hydroxide ion, separate from the metal. In contrast, when nonmetallic oxides react with water, the oxygen ends up as part of the nonmetals species. What connection is there between this contrasting behaviour of metal and...

When metal oxides react with water, the oxygen generally ends up as the hydroxide ion, separate from the metal. In contrast, when nonmetallic oxides react with water, the oxygen ends up as part of the nonmetals species. What connection is there between this contrasting behaviour of metal and...

Greetings ! I have a little question. My teacher was talking about stable ions some days ago, he wanted to explain why do we have certain stable ions in ionic compounds and we don't have other ions. For example, we notice that the stable ion of Na (in its compunds) is Na+1 and not Na+2 or...