if an astronaut
landed on a planet made of antimatter
a) he rebounce back
b) annihilate
c)oxidize
d) none of the
above
what are the names of the
elements in glucose
a) carbon. hydrogeb and oxygen
b) carbon, glycogen and oxygen
c) carbon, nitrogen and hygen
d) carbon, chlorine and hydrogen
of the following sugar molecules, which is not a disaccharide?
a) sucrose
b)lactose
c)glucose
d) fractose
the smallest particle of those listed below is
quark, pion, moun, electrons
a) quark
b) moun
c)pion
d) electron
an element is
distinct because of its number of
a) electrons
b)neutrons
c)protons
d)atoms
how do matter and antimatter differ?
a) opposite mass
b)opposite charge
c)opposite spin
d)opposite momentum
what makes an
element distinct
a) proton
b) electron
c)quarks
d) lepton
the element gold contains
a) 79 protons
b) 80 protons
c) 81 protons
d) 82 protons
which is the
lightest particle?
pion, moun,
electron, lepton
a) pion
b) muon
c)electron
d) lepton
an electron in a 7s orbital has more energy than one in a 1s orbital
because
answer this question
how many shells are
occupied by electrons in the gold atom (au, atomic #79)?
a)13
b)11
c)7
d)6
e)5
how many electrons are
unpaired in the outermost shell of aluminum
a) 3
b)2
c)1
d)4
e)5
why is 1s orbital
lower in energy than 2s
answer this question
for a multielectron atom, a 3s orbital lies lower in energy than a 3p
orbital because
a) different shell
b) different energy levels
c) different energies
d) none of the above
more energy is
required to remove an electron from a 2s orbital than from the 2p orbital.
because the 2s is
closer to the nuceus and much attracted than the 2p orbital electrons
which is associated with more energy a 2s, 2p, 3p or a 3s orbital
a) 3p
b)2s
c)2p
d)3s
when an electron in
an atom is excited from a lower energy level to a higher one a
a) new atom is
formed
b) an ion is formed
c) a photon is
given off
d) none of the
above
how many shells are occupied by electrons in the gold atom
a)5
b)7
c)5
d)4
how many electrons
does gold have
a) 20
b) 67
c)79
d) 82
how many neutrons does gold- have
a) 79
b)90
c) 85
d)none of the above
how many electrons
does iron have
a) 1
b)60
c) 50
d) none of the
above
93. outermost shell of aluminum
(al, atomic number 13)?
a) 13
b)3
c)10
d) 12
how many electrons are in the outermost shell of phosphorus (p, atomic
number 15)?
a) 5
b) 4
c) 3
d)2
the number of
elements in a period is
a) 7
b) 8
c) 9
d) 10
one element is distinguished from another by the number of
a) protons
b) electrons
c) neutrons
d) quarks
an atom loses an
electron to another atom, it called
a)donor
b) ion
c) recipient
d)acceptor
the number of elements in a period is equal to the electron capacity of
the .......
a) group
b) shells
d) orbitals
c)none of the above
the effective
nuclear charge in the fourth shell of an argon atom is
a) 8
b) 0
c) 2
d)1
the number of elements in a period is
a) 7
b) 8
c)9
d) 10
number of shell of
phosphorus (p, atomic number 15)?
a) 5
b) 4
c) 3
d) 2
e) 1
how many valence electrons are in an atom of strontium (sr) consult the
periodic table
a)1
b)3
c)2
d)7
e) none oft the above
how many valence electrons are in an atom of
magnesium
a) 2
b) 40
c)3
d) 1
how many valence electrons are in an atom of oxygen
a) 5
b) 6
c) 7
d)2
cesium has one
valence electrons
true or false
what is valence electrons
of calcium ?
a) 2
b)3
c) 4
d) 1
what would you
expect the electron configuration of element 113 to be
a) 1s2 2s2 2p6 3s2
3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10
b) 1s2 2s2 2p6 3s2
3p6 3d10 4s2 4p6
c) 1s2 2s2 2p6 3s2
3p6 3d10 4s2 4p6 4d10 4f14
d) none of the
above
if an electrically neutral atom with an atomic number of 8 and a mass of
18 , what is N?
a) 10
b) nitrogen
c) 8
d) 9
what was the key characteristic by which dmitri mendeleev arranged his
periodic table?
a) increasing number of neutrons
b) increasing number of electrons
c) increasing mass number
d) none of the above
the atomic mass of
f is ___.
a)17
b)18
c) 19
d)20
which orbital block are the valence electrons of iron (fe) located?
a) s
b) p
c) d
d) f
the superscript
number in atom is called
a) atomic number
b) number of
neutons
c) mass number
d) none of the
above
.
how does calcium obey the octet rule
a) 2 88 2
b) 2 10 8
c) 2 8 10
d)none of the above
if has ___ valence
electrons.
A) 7
B)8
C)9
D)3
. how many electrons in n=7
l=3 ml=-1
A)1
B)2
C) 3
D)0
n=7 l=2 ml=-1 how many electrons
a) 2
b)3
c) 4
d) 0
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) photoemssion
b) difraction
c) photosynthesis
d) none of the
above
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