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