Question

Southern University at New Orleans Name Due Date 11/05/2019 Fall 2019 General Chemistry (CHEM 111) Homework 4 Part A. Circle the correct answer. 1. In Bohr's atomic theory, when an electron moves from one energy level to another energy level more distant from the nucleus: a. Energy is emitted. b. Energy is absorbed. c. No change in energy occurs. d. Light is emitted. e. None of these 2. The magnetic quantum number is related to the orientation of the orbital in space relative to the other orbitals in the atom. a. True b. false 3. The number of orbitals having a given value of/ is equal to a. 21+1 b. 2n+2 c. 31 d. 1+ e, the number of lobes in each orbital 4. or the following elements, which has occupied d orbitals in its ground-state neutral atoms? a. Ba b. Ca c. Si d. P e. CI 5. A paramagnetic element is an element a. that always has an element in an excited state. b. that is missing electrons. c. that are attracted to a magnet. d. that are not attracted to a magnet. e. that forms a molecule with two atoms. 6. Which of the following combinations of quantum numbers is not allowed? a. n=1,1 = 1, m. 0, ms =% b. n=3,1 = 0, m=0, ms -- c. = 2,1 = 1, m=-1, ms = % d. n = 4,1 = 3, mi=-2, ms -- e n =4,1 = 2, mı = 0, ms=2

Answer 1

Answer 1):- b) Energy is absorbed. Thus is because the energy level which is more distant from nucleus is higher in energy than the energy level from which transition is taking place.

Answer 2):- a) True.

Answer 3):- a) 2(l)+ 1

Answer 4):- a) Ba

The electronic configuration of Ba is = 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 5s² 5p⁶ 6s².

Answer 5):- A paramagnetic substance is an element- option c)" that are attracted to a magnet".

Answer 6):- a) n=1 , l=1 , ml= 0, ms= 1/2. " quantum number combination is not allowed". This is because for n=0 only allowed value for l is 0.