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WorksheetsCHAPTER 5 ELECTRONS IN ATOMS
Total questions: 20
Worksheet time: 10mins
Bohr's contribution to the development of atomic structure
was referred to as the "plum pudding model".
was the discovery that electrons surround a dense nucleus.
was proposed that electrons travel in circular orbits around the nucleus.
is the quantum mechanical model
What is the total number of orbitals in the third principal energy level?
1
4
9
16
What is the maximum number of electrons allowed in the third energy level?
2
8
18
32
What is the maximum number of electrons that can occupy one orbital?
1
2
8
18
The electron configuration for fluorine is
1s22s22p3
1s22s22p5
1s22s22p6
1s22s22p63s2
The first three electrons that enter into p orbitals must have
parallel spins.
opposite spins.
low energy levels
opposite charges.
The atom whose electron configuration is 1s22s22p63s23p1 is
Ba
Na
Al
Ga
The configuration for the outermost energy level in Ca is
3s2
4s2
2s1
4s1
The element having the same s and p configurations for principal energy level 3 as the element F has for its principal energy level 2 is
Na
Al
P
Cl
The frequency and wavelength of all waves are
directly related
inversely related
unrelated
equal
The SI unit of cycles per second is called a
photon
quantum
hertz
hund
Among the following groups of atoms, which have the same outer energy level configurations?
H, He
Li, Be, N, Ne
Mg, Al, Ca, Ga
N, P, As, Bi
The wavelength of light with a frequency of 2.50 × 1013 s-1 is
1.20 × 105 m
8.33 × 105 m
1.20 × 10-5 m
8.33 × 10-5 m
Once the electron in a hydrogen atom absorbs a quantum of energy, it
is now in its ground state.
is now in its excited state.
has released a photon.
none of the above
The fourth principal energy level has
4 orbitals
16 orbitals
32 orbitals
9 orbitals
If the electron configuration of an element is 1s22s22p63s23p5, the element is
iron
bromine
chlorine
phosphorus
The quantum mechanical model of the atom
is concerned with the probability of finding an electron in a certain position.
was proposed by Neils Bohr.
defines the exact path of an electron around the nucleus.
has many analogies in the visible world.
As the frequency of light increases, the wavelength
increases
remains the same
decreases
approaches the speed of light
The formula 2n2 represents
the number of sublevels in any energy level.
the maximum number of electrons that can occupy an energy level.
the number of orbitals in a sublevel.
none of the above
According to Hund’s rule, when electrons occupy orbitals of equal energy, one electron enters each orbit until
all the orbitals contain one electron, with spins parallel.
all the orbitals contain one electron, with opposite spins.
there are two electrons in each orbital.
electron velocities become constant.
