An electron falls to the n= 1 energy level (i.e. nf =1) during a transition. The wavelength of the line emitted was 95 nm. Calculate the energy level the electron fell from (i.e. ni) to the nearest whole number. Calculate the energy of this line. 12. What is the difference in explanation between the quantum mechanical treatment of the electron in the atom and that from classical physics? 13. Based on quantum mechanics, the wave function of an atomic orbital has four quantum numbers. (a) What is the name and symbol of each of these quantum numbers? (b) Briefly explain which property of the atom each quantum number governs. (c) What are the permitted values for each quantum number? 14. Give the allowable combinations of quantum numbers for each of the following electrons: (a) A 4s electron (b) A 3p electron (c) A 5f electron (d) A 5d electron 15. Tell which of the following combinations of quantum numbers are not allowed. Explain your answers. (a) n = 3, l = 0, ml = -1 (b) n = 3, l = 1, ml = 1 (c) n = 4, l = 4, ml = 0 16. What type of electron orbital (s, p, d, f) is designated by: (a) 14 a above (b) 14 b above (c) n = 4, l = 3, ml =3 17. State the total capacity for electrons in: (a) n = 4 (b) a 3s sublevel (c) a d-sublevel (d) a p-orbital 18. Give the expected ground state electron configuration for the following species with and without the use of the abbreviation of the proceeding noble gas to represent inner-shell electrons. (a) O2(b) Cl(c) Ge (d) Cu2+ (e) Ta 19.…
4 2. Mendeleev observed this to be true but there is no underlying physical reason. 3. they have the same total number of electrons.…
10. If the spin of one electron in an orbital is clockwise, what is the spin of the other electron in that orbital?…
an electron in the highest occupied energy level 28. a. Group 5A; 5 valence electrons E LESSON 7.1 PR Answers NLIN 7 Assessment * 36. State the number of electrons either lost or Lesson by Lesson gained in forming each ion. a. Br e. b. Na f. c. As3 g. 2 d. Ba h. 7.1 Ions 27.…
16. If an electron has absorbed energy and has shifted to a higher energy level, the electron is said to be in an…
Stable Atoms: have 2 electrons max in the 1st shell & all other shells must have a max of 8…
atoms of metallic atoms lose electrons, atoms of nonmetal atoms lose or share electrons with another nonmetal elements to achieve a complete octet…
2c. (2 pts) Identify the atomic orbital that_ the lone pair electrons on N atom are contained in for…
Introduction: According to the Bohr atomic model, electrons orbit the nucleus in fixed paths with specific energies. Each path is therefore often referred to as an “energy level”. Electrons possessing the lowest energy are found in the levels closest to the nucleus. Electrons of higher energy are located in progressively more distant energy levels.…
* The total number of electrons gained in a reaction must equal the total # of electrons lost.…
4. Praseodymium (Pr Z=59) is one of the lanthanide (rare earth) elements. Which of the following statements is a TRUE statement about the orbital into which the last electron was filled for the element Pr? A. B. C. D. E. The number of radial nodes is greater than the number of angular nodes The orbital is a 5f orbital The orbital contains valence electrons The orbital is one member of a set of seven degenerate orbitals none of the other four statements is true…
* Atoms with the same number of electrons in their outermost shell belong in the same group of the periodic table.…
Boron compounds such as borax (sodium tetra borate, Na2B4O7·10H2O) have been known and used by ancient cultures for thousands of years. Borax’s name comes from the Arabic buraq, meaning “white.”…
The following table shows the first four ionization energies of the elements A to E in…
1. A cyclic planer structure and each atom must have a P orbital so that the electron cloud is not intterupted…