1. What is the wavelength, in nanometers, of light with an energy content of 2.63E(-6) kJ/mol?

Answer: 4.55E4 nm

2. What is the maximum kinetic energy of an ejected electron if platinum metal is irradiated with 167-nm light? The threshold wavelength for a platinum metal surface is 212 nm.

Answer: 2.52E-19 J

3. What is the frequency, v, of the spectral line produced for the transition of an electron from n = 8 to n = 4 in a Bohr hydrogen atom ?

Answer: 1.542E14 (1/s)

4. If the electron in a hydrogen atom undergoes a transition from an n = 5 level to an n = 3 level, what is the wavelength of the radiation emitted?

Answer:1.28E-6 m

5. What is the shortest wavelength of light that can be emitted by a hydrogen atom that has an initial configuration of 4p1

Answer: 9.73E-8 m

6. What must be the velocity, in meters per second, of a beam of electrons if they are to display a de Broglie wavelength of 9.41 μm?

Answer: 77.3m/s

7. Consider the 6f orbital of a hydrogen atom.

a) How many different 6f orbitals are there? Answer: 7

b) How many radial nodes are there? Answer: 2

c) How many angular nodes are there? (i.e. How many nodal planes or surfaces, not including radial nodes?)
Answer: 3

8. The radial probability distribution for an orbital in the n = 5 shell is shown below.

What type of orbital is it?

Answer: 5d

9.

a) It takes _________ electrons to fill the 4d subshell of an atom. Answer: 10

b) It takes __________ electrons to fill the n=4 shell of an atom. Answer: 32

10. For a V atom in its ground electronic state:

a) How many electrons are there in the 4s orbital?
Answer: 2

b) How many electrons are there in the 3d orbitals?
Answer: 3

c) How many electrons are there in the 4p orbitals?
Answer: 0
d) How many unpaired electrons are there?
Answer: 3

e) To what block of the periodic table does V belong?
Answer: d

11. For the following groups of elements, select the one that has the property noted.

a) The largest atom. Answer: Ba

- Cr
- l
- Ca
- Ba
- Pb
- Nb

- Mg
- Si
- Sb
- ln
- F
- Cs

(c) The most negative electron affinity.
Answer: Cl

- Ga
- Te
- Rb
- Sr
- Cl
- Bi

(d) The largest number of unpaired electrons.
Answer: As

- Te2−
- Br
- As
- Hf3+
- Sr2+
- La3+

12. What is the ground-state electron configuration of the Fe3+ ion? [Ar] 4s2 3d6

Answer:
[Ar] 3d5
- [Ar] 4d5
- [Ar] 4s2 4d3
- [Ar] 3d5
- [Ar] 4s2 3d3

13. Which of the following is/are paramagnetic in the ground electronic state?

Answer: V3+,Ti,S,Fe- V3+
- Na-
- Zn2+
- Ti
- S
- Fe

14. Which atom has the largest covalent radius?

Answer: As- P
- S
- Se
- O
- As

15. Which choices represents the correct ordering of radii from smallest to largest?

Answer:
Na+ < K+ < Rb+ < Ba2+
- O < Se2− < S < Te2−
- Na+ < K+ < Rb+ < Ba2+
- S < S2− < P3− < P
- Mg2+ < Al3+ < Si4+ < P5+

16. Which of the following species is diamagnetic?

Answer: Ba- Te
- Ba
- Ti
- Pb

I downloaded the solutions from this page, however it was not the solutions for this assignment. It was the solutions for the aqueous solutions assignment

ReplyDeleteheya I'll take a look at this when i get back today. I haven't touched my first year work in ages

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