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