ISC Chapter 9
One of the following is NOT an example of a chemical reaction
A. blending of a vanilla milkshake
Which of the following substances is NOT a compound?
Propane gas burns in oxygen to produce carbon dioxide and water and energy. The reactant(s) in this reaction are:
Propane gas burns in oxygen to produce carbon dioxide and water and energy. For this reaction, energy is
When bonds are broken during a chemical reaction
B. energy is released
Which is NOT true of an ionic bond? It
B. involves sharing of electrons
A chemical bond can be described by the following EXCEPT:
C. molecular orbital combination
Which of the following does NOT occur during ionic bond formation?
B. nonmetal atoms lose valence electrons
What is the nature of the C-O bond?
B. polar covalent
How many valence electrons does the element nitrogen have?
Microwave radiation is able to cook food because:
D. it breaks hydrogen bonds between water molecules resulting in a release of energy
A non-metal atom combines with a second non-metal atom. The first non-metal atom
D. shares electrons with the second non-metal atom
Which of the following is NOT a property of an ionic compound?
D. does not form ions when dissolved in water
Which of the following is NOT true of a compound? It is a
D. substance that cannot be broken down into simpler units
The smallest unit of an element that can exist alone or in combination with other elements is:
The smallest particle of a compound or of a gaseous element that can exist and still retain the characteristic properties of that substance is:
A chemical reaction does NOT involve:
B. changing atoms to form new elements
What determines the chemical properties of an atom?
A. valence electrons
Atoms attempt to acquire an outer orbital with eight electrons is a statement of the:
C. octet rule
The family or group number of the representatives elements represents the
C. total number of valence electrons
Atoms that achieve an octet by sharing electrons form
A. covalent bonds
There are three general classes of chemical bonds. The one that does not belong to this group is
The electrostatic attraction between positive and negative ions is called
A. an ionic bond
The energy released during the formation of an ionic bond is
B. heat of formation
There are two types of electrons pairs. The one type that is not an electron pair is
B. group pair
Pure substances that can not be broken down into anything simpler are:
Chemical energy is defined as:
A. change of internal potential energy during a chemical reaction
A metallic bond is defined by all of the following EXCEPT:
B. restricts movement of electrons
An ion can be described as an element that:
C. gains or loses electrons
What is the meaning of the subscripts in a chemical formula?
A. number of atoms of an element in a compound
ISC Chapter 9
ISC Chapter 9