which of the
following is a reasonable criticism of the bohr model of the atom?
answer this
questions
the phenomenon easily explained only in terms of the particle model of
light is
a) photoemission
b) diffraction
c) photosynthesis
d) none of the above
both electrons and
protons have equal-magnitude of
a) quarks
b) mass
c) charge
d) none of the
above
a new theory conforms to the correspondence principle when it
answer this question
the number of protons in a neutral atom is balanced by an equal number
of
a) neutrons
b) quaks
c) electrons
d) leptons
according to the
bohr model, an electron in an excited state of hydrogen can emit
a) beta particles
b) positrons
c) photons
d) alpha particles
164. the spectra of atoms reveal
their
a) shells
b) orbitals
c) energy
d) configuration
e) none of the above
a stable electron
orbit cannot exist if its circumference is
a) circular
b) rectangular
c) spherical
d) square.
what is the wavelength of light that is emitted when an excited electron
in the hydrogen atom is emitted
a) 500nm
b)450nm
c)490nm
d) none of the above
which of the
following is an incorrect designation for an atomic orbital?
a) 1s22s2263s2
b) 1s22s2263s23p6
c) 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10
4f14 5s2
d) 1s22s2262d
e) 1s22s2263s2
if n = 2, how many orbitals are possible?
a) 1
b) 2
c) 3
d) 4
e) 5
how many f orbitals
have the value n = 3?
a) 1
b) 3
c) 5
d) 0
how many d orbitals have n = 4?
a) 12
b) 12
c) 13
d) 14
e) 0
how many p orbitals
have n = 4?
a) 1
b) 12
c) 13
d) 14
e) 15
yellow light can have a wavelength of 579 nm. the energy of a photon of
this light is
a) 120mj
b) 10mj
c) 15mj
d) none of the above
how many orbitals in n=5
a) 12
b) 13
c) 10
d) 9
e) 7
how many orbitals in n=4
a) 7
b) 6
c) 5
d) 4
e) 3
f) 1
how many orbitals
in n=2
a) 1
b) 2
c) 3
d) 4
e) 5
how many orbitals in n=3
a) 3
b) 4
c) 5
d) 6
e) 7
how many electrons
in n=3
a) 18
b) 8
c) 15
d) 12
e) 2
how many orbitals in n=6
a) 15
b) 14
c) 13
d) 12
e) 11
how many orbitals
in n=1
a) 1
b) 2
c) 3
d) 4
e) 5
what is the maximum
number of electrons in the n = 3 level?
a) 11
b) 21
c) 13
d) 14
e) 18
how many electrons
can the 4th energy level hold
a) 32
b) 64
c) 18
d) none of the
above
how many valence electrons are in a neutral lithium atom
a) 0
b) 2
c) 3
d)1
what term is used
for the electrons in the outermost shell or energy level
a) orbital
electrons
b) charged
electrons
c) electron cloud
d) valence
electrons
how many electrons can each shell hold
a) 8
b) 18
c) given by 2n2
d ) 32
how many electrons
can fit in the second energy level
a) 18
b) 8
c) 2
d) 20
electron shells 2 8 8 18, obeys
a) hunds rule
)b) octate rue
c)paulin exclusion principle
d) none of the above
how many electrons
can fit in the third energy level
a) 8
b)18
c)2
d) none of the
above
how many electrons can each orbital hold
a) 1 4 8 14 for spdf respectively
b) 1 4 18 14 for spdf respectively
c) 2 6 10 14 for spdf respectively
d) 1 14 8 14 for spdf respectively
how many electrons
can fit in the second energy level
a) 2
b) 10
c) 8
d) 14
how many valence electrons are in a neutral lithium atom
a) 2
b) 8
c) 18
d) 8
for an electron to
fall from the third energy level to the second energy level it must
a) absorb energy
b) release energy
c) be excited
d) emit beta
particles
who first suggested the concept of atoms?
a) john dalton
b) democritus
c) rutherford
d) albert Einstein
why could bohr's
model be called a planetary model of the atom
a)it confirm rutherford
model
b) it reflect the
solar system
c) it depict
jupiter moon
d) none of the
above
how do electrons in the same atom differ
a) they are isotope
b) different valence electrons
c) different number of neutrons
d) different molecular mass
how did he( rutherford)
know that the nucleus was positively charged
a) the electrons
reflects backward
b) the alpha
particle bounce back
c) most of the
alpha particles pass through
d) none of the
above
why do electrons move from the negative end of the tube to the positive
end
a) they are pulled by gravity
b) they are negatively charged
c) they are neutral entities
d) none of the above
what was thompson
working with when he discovered the cathode rays
answer this
question
what is the name of john dalton's theory
a) daltons atomic theory
b) dalton atomic model
c) plum pudding model
d) planetary model
why is rutherford's
experiment called the gold foil experiment
a) it is used to
convert metals to gold
b) gold particels
are used
c) the lab
apparatus where golden
d) gold atom was
scatttered.
who said an electron have to absorb or release energy to jump from the
second energy level to the third
a) neil bohr
b) dalton
c) rutherford
d) none of the above
what is the charge
of an alpha particle
a) positve
b) +2
c) -2
d) -1
how did he know that an atom was mostly empty space
a) the electrons reflects backward
b) the alpha particle sbounce back
c) most of the alpha particles pass through
d) none of the above
how did ernest
rutherford know that an atom was mostly empty space
a) the electrons
reflects backward
b) the alpha
particle sbounce back
c) most of the
alpha particles pass through
d) none of the
above
No comments:
Post a Comment