The actual ionization energy of He is 2372.3 kJ/mol. Which of the following can be said about the ability of one 1s electron in He to shield the nuclear charge from the other 1s electron? it does not shield at all O it does a poor job of shielding O it shields completely O it does a good job of shielding

Which is larger, an atom or its positive ion and why?

A radiologist is preparing a radioactive isotope of iodine-131 to examine the thyroid gland if regular iodine had an atomic mass of 127 and an electron configuration of [Kr] 4d10 5s2 5p5. What is the electron configuration of the iodine 131 isotopea) [Kr] 4d10 5s2 5p5 b) [Ar] 6s24f1 c) [Kr] 4d10 5s2 5p9 d) [Ar] 6s25f1 e) none of the previous

Alpha emissions from Po-210 are used in paper manufacturing to reduce static electricity. This is possible since alpha particles   can easily knock off electrons   catalyze chemical reactions, which involve valence electrons   are positively charged so they attract electrons   create enough heat to catalyze chemical reactions that use up electrons

In the equation used to determine the energy of the particles described in question (11), E = hc/λ, what is h called?

What is effective nuclear charge?   the net charge of the electrons in the outermost levels the average or net charge from the nucleus experienced by the electrons in the outermost levels the net charge of nucleus and all electrons the average or net charge from the nucleus experienced by the inner electrons