casey chemistry chapter 10, 11, 12 practice test
Draw the Lewis structures for the following compounds to assist you: BeH2, TeF4, ClO3-, SeO2 How many of the compounds are polar overall?
3
How many of the following are endothermic processes? I. activated cold pack II. activated warm pack III. boiling water on a hot stove IV. melting ice cube on a kitchen table
3
The number of polar covalent bonds in NH3 is
3
How many electrons are needed to completely fill the fourth energy level?
32
The maximum number of electrons allowed in the fourth energy level is
4
The number of p orbitals in the fourth principal energy level is
4
A given set of d orbitals consists of _____ orbital(s).
5
A gas absorbs 56 kJ of heat and does 31 kJ of work. Calculate (delta) E.
56 - 31 = 25
The electron configuration for the carbon atom (C) is 1s2 2s2 2p2. The atomic number of carbon is
6
A system absorbs 159 kJ of heat, and performs 95 kJ of work on the surroundings. what is (delta) E of the system?
64
For the f sublevel, the number of orbitals is
7
How many orbitals can exist at the third main energy level?
9
What element has the electron configuration 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2?
Ba
Which of the following elements has the lowest electronegativity? A. Na B. Ca C. Rb D. Cl E. S
Rb
Rank the following bonds from least polar to most polar. Si-Cl, P-Cl, Mg-Cl, S-Cl
S-Cl, P-Cl, Si-Cl, Mg-Cl
The element with electron configuration 1s2 2s2 2p6 3s2 3p2 is
Si
The most electronegative element is A. Sr B. Zr C. Ba D. Si E. Zn
Si
The measure of disorder or randomness is termed
entropy
Liquid water turns to ice. Is this process endothermic or exothermic?
exothermic; The water released energy, slowing the water molecules down to form solid ice
the energy of a photon, or quantum, is related to its
frequency
Thermal energy is transferred from a hot object to a colder object by means of
heat
In SI, the frequency of electromagnetic radiation is measured in
hertz
Nonmetal elements typically have _____ electronegativities
high
Chemical bonds formed by the attraction of oppositely charged ions are called
ionic bonds
Heat is typically measured in
joules
If electromagnetic radiation A has a lower frequency than electromagnetic radiation B, then compared to B the wavelength of A is
longer
When the system does work on the surroundings the sign of work is
negative
How many electrons can occupy the s orbitals at each energy level?
two, if they have opposite spins
The electron configuration for the phosphorus atom is
1s2 2s2 2p6 3s2 3p3
The correct electron configuration for Mn is
1s2 2s2 2p6 3s2 3p6 4s2 3d5
A single orbital in the 3d level can hold ____ electrons.
2
Draw the Lewis structures for the following compounds to assist you: BeH2, TeF4, ClO3-, SeO2 How many of the compounds have at least one bond angle that is 120°?
2
A given set of p orbitals consists of _____ orbital(s).
3
Kinetic energy depends on
the mass and velocity of the object
(delta) E for a system is 29 kJ. If 175 kJ of work was done on the system, how much heat was released?
-146 kJ
When 1 mole of ethylene (C2H4) is burned at constant pressure, 1410 kJ of energy is released as heat. Calculate (delta) H for a process in which 10.0 g of ethylene is burned at constant pressure.
-503 kJ
The maximum number of electrons in the third principal energy level of an atom is
18
the electron configuration for oxygen atom is?
1s2 2s2 2p4
The electron configuration for manganese is
1s2 2s2 2p6 3s1 3d6
The electron configuration for Ca2+ is identical with
Ar
The least electronegative element is A. Ba B. Cu C. Pb D. Se E. O
Ba
Which of the following has a double bond? B. C2H4 C. H2O D. CN- E. None of the above
C2H4
Which of the following has a triple bond? A. CO B. CH4 C. NO3- D. SO2
CO
Calcium reacts with fluorine to form
CaF2
Which of the following atoms has the greatest electronegativity? A. Na B. Rb C. Cl D. Se
Cl
1s2 2s2 2p6 3s2 3p6 4s2 3d7 is the electron configuration for which of the following atoms?
Co
What element has the electron configuration 1s2 2s2 2p6 3s2 3p6 4s2 3d10?
Cu
which element has the largest number of electrons in its valence shell? -As -F -K -Fr -S
F
The lewis structure for which of the following contains the greatest number of lone pairs of electrons? -F2 -H2 -H2O -CH4 -HF
F2
Which of these elements has the highest electronegativity? - Sr - I - Y - In - Sb
I
what element has the electron configuration 1s2 2s2 2p6 3s2 3p6 4s1?
K
The electron configuration for the bromide ion is identical to that of...
Kr
Which of the following has only nonpolar covalent bonds? - HI - NaCl - CO - N2 - CCl4
N2
What element has the electron configuration 1s2 2s2 2p6 3s2 3p6 4s2 3d8? A. Cu C. Ar D. Ni E. Zn
Ni
What element has the electron configuration 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p2? A. Sn B. Ba C. Pb D. Po E. None of the above
Pb
In ionic bonding
a noble gas configuration is formed for each element or ion.
The color of a polar bear's fur is
colorless
The Aufbau principle states that an electron
occupies the lowest available energy level
The statement that no two electrons in the same atom can have the same four quantum numbers is?
pauli exclusion principle
A quantum of electromagnetic energy is called a(n)
photon
When heat flows into the system, the sign of heat is
positive
In an exothermic reaction _____ energy is converted to _____ energy.
potential, kinetic
The main energy levels of an atom are indicated by the
principal quantum numbers
The form of EMR that has less energy per photon than microwaves is
radio waves
when moving down a group (family) in the periodic table, the number of valence electrons...
remains constant
Which of the following is a measure of the random motions of the components of a substance?
temperature
the statement that an electron occupies the lowest available energy orbital is?
the Aufbau principle