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When naming a binary covalent compound, what determines the prefix for an element in the compound?
 
The number of atoms of that element in the compound.
 
The number of different elements in the compound.
 
The number of valence electrons in the element.
 
The total number of atoms in the compound.
In hybridization, how do you know how many hybrid orbitals are formed?
 
It is the same as the number of orbitals that have combined.
 
It is the same as the total number of atoms in the molecule.
 
It is the same as the total number of electrons.
 
It is the same as the number of valence electrons.
If a polyatomic ionic compound has gained two hydrogen ions, such as H2 PO4 -. How does its name begin?
 
Dihydrogen
 
Hydrogen (II)
 
Hydrous
 
Hydrogen
In larger atoms, why can outer electrons move more freely?
 
Electrons are in higher energy shells, less tightly held.
 
atoms have more protons, which means more electron moves
 
Larger atoms have more electrons, atom less stable
 
no answer
How many elements of unsaturation does a molecule with this chemical formula have? C5H8
 
2
 
1
 
5
 
3
Which of the following is an example of an ionic compound?
 
NaCl
 
O3
 
Na
 
CO2
Why must we consider a molecule's shape when determining its polarity?
 
The shape reveals more about distribution of charge.
 
A molecule may have different shapes depending its polarity
 
Symmetrical molecules are always non polar.
 
Non polar molecules have dipoles that do not cancel out
How many valence electrons are in a carbon dioxide (CO2) molecule?
 
16
 
8
 
24
 
12
If a central atom of a molecule only has two electron domains, what is the bond angle associated with the molecule?
 
180o
 
120o
 
90o
 
109.5o
When drawing Lewis dot structures, what should you do if you run out of electrons before all atoms are satisfied?
 
Try double or triple bonds.
 
Add the missing electrons.
 
Make a resonance structure.
 
Leave it as it is.
What do you look at in the periodic table to determine the number of valence electrons possessed by an element?
 
The element's group number.
 
The element's atomic mass.
 
The element's atomic number.
 
The element's row number.
Identify the atom that is likely to have the highest electronegativity.
 
Non-metal oxygen, atomic number 8
 
Metal magnesium, atomic number 12
 
Non-metal selenium, atomic number 34
 
Metal beryllium, atomic number 4
What happens when both of the orbitals in a molecule are in phase, either both positive or both negative, and the electrons in the bonds are at their lowest energy level?
 
Bonding takes place.
 
The electrons in the atoms don't share orbitals.
 
The chemicals don't react.
 
The atoms don't bond.
What is an example of a naturally occurring inorganic macromolecule?
 
Diamond
 
Glucose
 
Sucrose
 
Nucleic Acid
How does an atom try to achieve a complete valence shell?
 
All answers are correct.
 
By adding electrons.
 
By sharing electrons.
 
By giving away electrons.
Why are metals shiny?
 
Because they reflect light photons.
 
Because they can be polished to a high gloss.
 
Because they absorb light photons.
 
Because they have mobile protons.
A hydrogen bond is _____.
 
an intermolecular force
 
a paramolecular force
 
a perimolecular force
 
an intramolecular force
How do you represent a triple bond in a structural formula?
 
::: or three horizontal lines
 
:::: or four horizontal lines
 
- or .
 
= or ::
How is an organic compound described?
 
Any compound that contains carbon plus another element.
 
Any compound that is involved in a living thing.
 
Any compound that is organic.
 
Any compound that contains carbon.
What is an anion?
 
An atom that has gained a valence electron and is negative.
 
An atom that has lost a valence electron and is negative.
 
An atom that has gained a valence electron and is positive.
 
An atom that has lost a valence electron and is positive.
In chemistry, the Greek letter delta:
 
Designates partial charges
 
Tells you what Greek organization you belong to.
 
Indicates that a bond will not occur between atoms.
 
Signifies an ionic bond between atoms.
Which of the following is true of intermolecular forces?
 
The forces that exist between molecules.
 
The forces that exist within a molecule.
 
The strongest force in chemistry.
 
The force that bonds hydrogen with oxygen.
A cation has a _____ charge.
 
Positive
 
New
 
Neutral
 
Negative
Which of the following is NOT a property of covalent compounds?
 
Superior malleability
 
Low boiling points
 
Solids are brittle and variously colored
 
Poor conductors of heat and electricity
Which of these do you need to know to use the hybridization theory?
 
The number of valence electrons in the participating atoms
 
How many of each molecule are being made
 
What period the element is in on the periodic table
 
The total number of electrons in the participating atoms
If an ionic compound contains a transition metal, Roman numerals are used to determine the _____.
 
charge on the ion
 
order of appearance
 
amount of chloride
 
version of the ion
What causes a dipole?
 
When the electrons are concentrated more 1 end of a molecule
 
When the molecules are repelled from each other.
 
When the molecules are attracted to each other.
 
When the protons are concentrated more at one end
Which of the following best describes the term dipole moment?
 
When electrons are unevenly distributed
 
A non polar molecule
 
Having more than four dipoles
 
When several atoms in a compound are electronegative


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