Levels Tought:
Elementary,Middle School,High School,College,University,PHD
Teaching Since: | Apr 2017 |
Last Sign in: | 3 Weeks Ago, 6 Days Ago |
Questions Answered: | 7568 |
Tutorials Posted: | 7350 |
BS,MBA, PHD
Adelphi University/Devry
Apr-2000 - Mar-2005
HOD ,Professor
Adelphi University
Sep-2007 - Apr-2017
Question 1
1 / 1 pts
The __________ shell is the outermost occupied shell of electrons in an atom.
Â
 crystallizedÂ
 valenceÂ
 hybridizedÂ
 coreÂ
Â
Question 2
1 / 1 pts
In Lewis electron dot structures, each valence electron is represented by __________.
Â
 a single dotÂ
 the s orbitalÂ
 a p blockÂ
 three linesÂ
Â
Question 3
1 / 1 pts
The __________ theory states that a molecule will adjust its shape so that the valence electron pairs stay as far apart from each other as possible.
Â
 VSEPRÂ
 HybridizationÂ
 OctetÂ
 Valence bondÂ
Â
Question 4
1 / 1 pts
In __________ bonds, atoms share two electrons.
Â
 loneÂ
 ionicÂ
 metallicÂ
 doubleÂ
Â
Question 5
1 / 1 pts
Some metals are __________ which means that they can be stretched, bent, or twisted without breaking.
Â
 ductileÂ
 toughÂ
 shinyÂ
 strongÂ
Â
Question 6
1 / 1 pts
__________ orbitals are obtained when at least two nonequivalent orbitals from the same atom combine in preparation for bond formation.
Â
 HybridÂ
 MolecularÂ
 SigmaÂ
 LoneÂ
Â
Question 7
1 / 1 pts
Given that the atomic mass of oxygen is 16, sulfur is 32, and hydrogen is 1, what is the molar mass of H2SO4?
Â
 512 g/molÂ
 7 g/molÂ
 49 g/molÂ
 98 g/molÂ
Â
Question 8
1 / 1 pts
__________ orbitals form when atomic orbitals combine to make covalent bonds.
Â
 SigmaÂ
 LoneÂ
 IonicÂ
 MolecularÂ
Â
Question 9
1 / 1 pts
6.022 x 1023Â is also called __________ number
Â
 Lewis'sÂ
 Hund'sÂ
 Avogadro'sÂ
 Dalton'sÂ
Â
Question 10
1 / 1 pts
A __________ bond is the attraction of the stationary metal cations to the surrounding mobile electrons.
Â
 loneÂ
 polarÂ
 metallicÂ
 covalentÂ
Â
Question 11
1 / 1 pts
A sigma bond can be represented by which of the following symbols?
Â
 σÂ
 πÂ
 βÂ
 λÂ
Â
Question 12
1 / 1 pts
__________ bonds form when two or more elements share electrons.
Â
 CovalentÂ
 MetallicÂ
 IonicÂ
 CompoundÂ
Â
Question 13
1 / 1 pts
A(n)Â __________ is a set of valence electrons that do not participate in bonding.
Â
 lewis structureÂ
 central atomÂ
 lone pairÂ
 anionÂ
Â
Question 14
1 / 1 pts
__________ is described as the mixing of the atomic orbitals in an atom to produce a set of hybrid orbitals.
Â
 HybridizationÂ
 ConfigurationÂ
 IonizationÂ
 DissolutionÂ
Â
Question 15
1 / 1 pts
A __________ force occurs when two polar molecules interact with one another.
Â
 dispersionÂ
 dipole-dipoleÂ
 ionizationÂ
 polyatomicÂ
Â
Question 16
1 / 1 pts
Unequal sharing of electrons is called molecular __________.
Â
 energyÂ
 valenceÂ
 geometryÂ
 polarityÂ
Â
Question 17
1 / 1 pts
Identify the anion in the following: Ba2+ + O2- → BaO
Â
 Ba-2
 Ba+2
 O-2
 O+2
Â
Question 18
1 / 1 pts
Cl- and PO43- are both examples of __________.
Â
 covalent bondsÂ
 isotopesÂ
 acidsÂ
 anionsÂ
Â
Question 19
1 / 1 pts
A pressure of one atmosphere and a temperature of 0°C is known as __________.
Â
 PiÂ
 Avogadro's NumberÂ
 a moleÂ
 STPÂ
Â
Question 20
1 / 1 pts
The __________ theory states that covalent bonds are formed by the overlap of partially filled atomic orbitals.
Â
 OctetÂ
 DipoleÂ
 VSEPRÂ
 Valence bondÂ
Â
Question 21
1 / 1 pts
Most pure metals are __________ which means they can be stamped, pressed, or rolled into thin sheets.
Â
 conductiveÂ
 ductileÂ
 shinyÂ
 malleableÂ
Â
Question 22
1 / 1 pts
__________ is the term that describes the ability of a material to withstand shock without rupturing.
Â
 DuctilityÂ
 ConfigurationÂ
 ToughnessÂ
 MalleabilityÂ
Â
Question 23
1 / 1 pts
The percent composition is the percent by __________ of each element in a compound.
Â
 areaÂ
 lengthÂ
 volumeÂ
 massÂ
Â
Question 24
1 / 1 pts
The __________ of an ionic compound occurs when water interacts with the ions in the crystal lattice, causing the lattice to break apart.
Â
 transitionÂ
 bondingÂ
 lusterÂ
 dissolutionÂ
Â
Question 25
1 / 1 pts
One mole of any chemical substance contains __________ representative particles.
Â
 6.022 x 1023
 5.322 x 106
 3.014 x 1010
 7.013 x 101
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