WorksheetsChemistry Semester 1 Quiz 2
Total questions: 20
Worksheet time: 15mins
The probability map of an electron which describes where an electron can be found 90% of the time is called
a photon
an electron configuration
an orbital
a primary energy level
As the wavelength of electromagnetic radiation (EMR) increases, which of the following also happens?
the frequency of the EMR and the energy is transfers also increase
the frequency of the EMR decreases while the energy it transfers increases
the frequency of the EMR increases while the energy it transfers decreases
both the frequency of the EMR and the energy it transfers decreases
the letters designated for the first three sublevels with the number of electrons accomodate in each sublevel are
s:1, p:3, d:10
s:2, p:6, d:10
s:1, p:6, d:5
which element has the electron configuration 1s2 2s2 2p6 3s2 3p4
S
Al
B
which element has a partially filled d orbital at ground state
Au
Zn
Te
Mooh
which of the following elements has a partially filled f orbital at ground state?
Mo
MIT
U
As
According to the Aufbau principle
an orbital may only be occupied by two electrons
electrons in the same orbital must have opposite spins
electrons enter orbitals with the lowest energy first before entering higher energy levels
electrons enter orbitals with the highest energy first before entering lower energy orbitals
what is the electron configuration of the element (Mn) at ground state?
1s2 2s2 2p6
1s2 2s2 2p6 3s2 3p6 4s2 3d5
1s2 2s2 2p6 3s2 3p6 4s1
Trends in the properties of elements in a group or family are best explained in terms of
electron ionization
atomic mass
atomic radius
electron affinity
going down a group on the periodic table, electron shielding____
decreases, increasing attraction between nucleus and valence electrons
decreases, decreasing the attraction of the nucleus for the valence electrons
remains constant
increases which decreases the attraction of the nucleus for the valence electrons
order the elements S,Cl, and F in order of increasing atomic radius
S, Cl, F
Cl, S, F
F, Cl, S
Cl, F, S
the effect of the inner electrons in an atom of the attraction between the nucleus and the valence electrons of an atom is called
electron affinity
electron shielding
electronegativity
how many electrons are in the third principal energy level of a Mn atom?
2
8
13
14
the f block includes which of the following
lanthanides and actinides
noble gases
non metals and transition metals
According to Pauli exclusion principle
electrons fill lower energy orbitals before filling higher energy orbitals
electrons in an orbital must have opposite spins (can only hold two electrons)
when slave owners vote to free slaves instead of free slaves
How does an atom if the element calcium (Ca) achieve noble gas configuration?
calcium loses two electrons to achieve noble gas configuration of Kr
calcium loses 2 electrons to get NGC of Ar
calcium gains 6 electrons to get NGC of Kr
a purely covalent bond is most likely to form between two elements that have a difference in electronegativity
0.1
0.7
1.4
2000
the correct lewis structure of a sulfur atom has
one lone pair of electrons and one single (unpaired) electron
one lone pair of electrons and 4 single (unpaired) electrons
two lone pairs of electrons and two single (unpaired) electrons
when a covalent bond forms between two atoms, the attraction between them is balanced with the repulsion and their PE is
at it's minimum
at it's max
equal to their kinetic energy
zero
According to VSEPR Theory, molecules adjust their shape to keep which of the following as far apart as possible?
pairs of valence electrons
nuclei
delocalized electrons
ionized electrons
