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