Electrons In Atoms 10/21/10

27 Questions | By Verdun | Last updated: Jan 18, 2013 | Total Attempts: 258

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Electrons in Atoms 10/21/10

Questions and Answers

1.

The number of wave cycles that pass a given point perunit of time
- A.
  
  Energy level
- B.
  
  Frequency
- C.
  
  Amplitude
2.

The SI unit of frequency
- A.
  
  Spectrem
- B.
  
  Wavelength
- C.
  
  Hertz
3.

Lines of colored light obtained by passing the lightemitted by an element through a prism
- A.
  
  Quantum of energy
- B.
  
  Aufbau principle
- C.
  
  Atomic emmission spectrum
4.

The region around an atomic nucleus where an electronis likely to be moving
- A.
  
  Atomic emission spectrum
- B.
  
  Energy level
- C.
  
  Frequency
5.

A range of colors seen when light passes through a prism
- A.
  
  Spectrum
- B.
  
  Atomic orbital
- C.
  
  Frequency
6.

Electrons enter orbitals of lowest energy first.
- A.
  
  Aufbau principle
- B.
  
  Frequency
- C.
  
  Hertz
7.

A region outside the nucleus where there is highprobability of finding an electron
- A.
  
  Amplitude
- B.
  
  Spectrum
- C.
  
  Atomic orbital
8.

The amount of energy required to move an electron from one energy level to the next higher one
- A.
  
  Quantum of energy
- B.
  
  Energy level
- C.
  
  Wavelength
9.

The distance between crests of waves
- A.
  
  Wavelength
- B.
  
  Amplitude
- C.
  
  Energy level
10.

The height of a wave from the origin to the crest
- A.
  
  Hertz
- B.
  
  Spectrum
- C.
  
  Amplitude
11.

The fourth principal energy level has
- A.
  
  4 orbitals.
- B.
  
  16 orbitals.
- C.
  
  32 orbitals.
- D.
  
  9 orbitals.
12.

If the electron configuration of an element is Is²2s²2p⁶3s²3p⁵, the element is
- A.
  
  Iron.
- B.
  
  Bromine.
- C.
  
  Chlorine.
- D.
  
  phosphorus.
13.

The quantum mechanical model of the atom
- A.
  
  Is concerned with the probability of finding an electron in a certain position.
- B.
  
  Was proposed by Neils Bohr.
- C.
  
  Defines the exact path of an electron around the nucleus.
- D.
  
  Has many analogies in the visible world.
14.

The electron configuration of calcium is
- A.
  
  Is2 2s2 2p2 3s2 3p3 4s2.
- B.
  
  1s2 2s2 2p10 3s2 3p4
- C.
  
  Is2 2s2 2p 3s2 3p6 3d8.
- D.
  
  1s2 2s2 2p6 3s2 3p6 4s2
15.

The maximum number of electrons that can occupy the third principal energy level is
- A.
  
  18.
- B.
  
  32.
- C.
  
  2.
- D.
  
  8.
16.

As the frequency of light increases, the wavelength
- A.
  
  Increases.
- B.
  
  Remains the same.
- C.
  
  Decreases.
- D.
  
  Approaches the speed of light.
17.

The formula 2n² represents
- A.
  
  The number of sublevels in any energy level.
- B.
  
  The maximum number of electrons that can occupy an energy level.
- C.
  
  The number of orbitals in a sublevel.
- D.
  
  None of the above
18.

In order to occupy the same orbital, two electrons must have
- A.
  
  The same direction of spin.
- B.
  
  Low energy.
- C.
  
  Opposite charge.
- D.
  
  Opposite spin.
19.

Stable electron configurations are likely to contain
- A.
  
  High-energy electrons.
- B.
  
  Unfilled s orbitals.
- C.
  
  Fewer electrons than unstable configurations.
- D.
  
  Filled energy sublevels.
20.

According to Hund's rule, when electrons occupy orbitals of equal energy, one electron enters each orbit until
- A.
  
  All the orbitals contain one electron, with spins parallel.
- B.
  
  All the orbitals contain one electron, with opposite spins.
- C.
  
  There are two electrons in each orbital.
- D.
  
  Electron velocities become constant..
21.

Identify the elements that have the following electron configurations. Is²2s²2p⁶3s²3p^l
- A.
  
  Cobalt
- B.
  
  Aluminum
- C.
  
  Krypton
22.

Identify the elements that have the following electron configurationsI^2s²2p⁶3s²3p⁶3d^w4s²4p⁶
- A.
  
  Aluminum
- B.
  
  Cobolt
- C.
  
  Krypton
23.

Identify the elements that have the following electron configurations. Is²2s²2p⁶3s²3p⁶3d⁷4sⁱ
- A.
  
  Aluminum
- B.
  
  Krypton
- C.
  
  Cobalt
24.

Consider the elements neon, bromine, and phosphorus. Which has three electrons in its 3p sublevel?
- A.
  
  Phosphorus
- B.
  
  Bromine
- C.
  
  Neon
25.

Consider the elements neon, bromine, and phosphorus. Which has its highest energy level completely filled?
- A.
  
  Bromine
- B.
  
  Phosphorus
- C.
  
  Neon

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