9) Standard temperature and pressure (STP), in the context of gases A) 298.15 K

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9) Standard temperature and pressure (STP), in the context of gases A) 298.15 K and 1 atm, B) 273.15 K and 1 atm, C D) 273.15 K and 1 pascal, E) 273.15 K and 1 tonr refers to 298.15 K and 1 torr Exam III B 10) An electron cannot have the quantum numbers n-_? , l- A)6,1,0 B)3,2,3 C)3,2,-2 D) 1,0,0 E)3,2, 11) Which two elements have the same ground-state electron configuration? A) Pd and Pt B) Cu and Ag C) Fe and Cu E) No two elements have the same ground-state electron configuration. D) CI and Ar 12) The orbital diagram for a ground-state nitrogen atom is ls 2s b) d) A) a B) b C)c D) d E)e 13) Of the choices below, which gives the order for first ionization energies? A) Kr >Se> Br > Ga > Ge B) Kr > Br > Se >Ge>Ga C) Ga > Br >Ge >Kr> Se D) Ga > Ge >Se > Br> Kr E) Br > Se > Ga> Kr> Ge 14) The n- 1 shell contains p orbitals. All the other shells contain D) 3, 3 p orbitals. A)3,6 B) 0,3 C) 6, 2 E) 0,6 15) Arrange aluminum, nitrogen, phosphorus, and indium in order of increasing electronegativity. AI

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Answers-:

Only Answers -

9. B

10.B

11.E

12.A

13.B

14.B

15.C

16.A

Answers with precise explanation-:

9- B ( Standard fact)

10- B ( 'm' varies from -l to +l and l varies from 0 to (n-1) )

11- E

12- A

13- B ( Ionization energy decreases from right to left across periods in periodic table)

14- B ( px , py , pz)

15- C ( Electronegativity increases from left to right and decreases down the group )

16- A ( size decreases as effective nuclear charge increases)

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