Question 1

The first electron shell of an atom can hold a maximum of

Accepted Answer

A)   1 electron.
B)   2 electrons.
C)   4 electrons.
D)   8 electrons.
E)   16 electrons.F) All of the above
G) B) and C)

Question 2

A solution that has a pH of 6 has ten times the hydrogen ion concentration of a solution with a pH of

Accepted Answer

A)   7.
B)   5.
C)   8.
D)   2.
E)   0.6.F) A) and B)
G) C) and E)

Question 3

In ____________ reactions,parts of one molecule can be removed and added to a different molecule.

Accepted Answer

The answer of In ____________ reactions,parts of one molecule can...

Question 4

The electrons of an atom occupy one or more areas of space called

Accepted Answer

A)   bonds.
B)   shells.
C)   regions.
D)   ions.
E)   nuclei.F) B) and C)
G) A) and E)

Question 5

A ________ reaction is symbolized as AB→A+B.

Accepted Answer

The answer of A ________ reaction is symbolized as AB→A+B....

Question 6

FX --> F + X is an example of a ________ reaction.

Accepted Answer

The answer of FX --> F + X is an...

Question 7

A covalent bond is formed by two atoms that share electrons.

Accepted Answer

A) True 
 B)False

Question 8

Steroid molecules have four connected rings of carbon atoms.

Accepted Answer

A) True 
 B)False

Question 9

When two or more atoms (reactants)bond to form a more complex structure (product)the reaction is called synthesis.

Accepted Answer

A) True 
 B)False

Question 10

Sodium and chloride ions readily combine because they have opposite charges.

Accepted Answer

A) True 
 B)False

Question 11

The smallest subatomic particle is the ________.

Accepted Answer

The answer of The smallest subatomic particle is the ________....

Question 12

As hydrogen ion concentration increases,the pH number

Accepted Answer

A)   gets.
B)   gets smaller.
C)   stays the same.
D)   becomes negative.
E)   approaches 14.F) B) and D)
G) B) and C)

Question 13

Which of the following is NOT organic?

Accepted Answer

A)   A carbohydrate
B)   A protein
C)   A lipid
D)   Carbon dioxide
E)   A nucleic acidF) All of the above
G) None of the above

Question 14

Inorganic substances that usually dissociate in water are called

Accepted Answer

A)   organic compounds.
B)   non-electrolytes.
C)   electrolytes.
D)   lipids.
E)   carbohydrates.F) C) and D)
G) C) and E)

Question 15

All isotopes of an element have the same number of electrons.

Accepted Answer

A) True 
 B)False

Question 16

Water accounts for 2/3 of the weight of an adult human.

Accepted Answer

A) True 
 B)False

Question 17

Each whole number on the pH scale represents a ________ - fold difference in hydrogen ion concentration.

Accepted Answer

A)   15
B)   100
C)   20
D)   10
E)   2F) A) and D)
G) A) and C)

Question 18

At present,there are 90 known naturally occurring ________.

Accepted Answer

The answer of At present,there are 90 known naturally occurring...

Question 19

A molecule of a compound always contains definite kinds and numbers of atoms.

Accepted Answer

A) True 
 B)False

Question 20

All of the food that we eat,liquids that we drink and medications that we take are

Accepted Answer

A)   chemicals.
B)   vitamins.
C)   proteins.
D)   nucleic acids.
E)   carbohydrates.F) A) and B)
G) A) and C)

Exam 2: Chemical Basis of Life

A ________ reaction is symbolized as AB→A+B.

Correct AnswerverifiedShow Answer

The first electron shell of an atom can hold a maximum of

Correct AnswerverifiedShow Answer

FX --> F + X is an example of a ________ reaction.

Correct AnswerverifiedShow Answer

All isotopes of an element have the same number of electrons.

Correct AnswerverifiedShow Answer

The smallest subatomic particle is the ________.

Correct AnswerverifiedShow Answer

A solution that has a pH of 6 has ten times the hydrogen ion concentration of a solution with a pH of

Correct AnswerverifiedShow Answer

Which of the following is NOT organic?

Correct AnswerverifiedShow Answer

As hydrogen ion concentration increases,the pH number

Correct AnswerverifiedShow Answer

In ____________ reactions,parts of one molecule can be removed and added to a different molecule.

Correct AnswerverifiedShow Answer

At present,there are 90 known naturally occurring ________.

Correct AnswerverifiedShow Answer

Each whole number on the pH scale represents a ________ - fold difference in hydrogen ion concentration.

Correct AnswerverifiedShow Answer

All of the food that we eat,liquids that we drink and medications that we take are

Correct AnswerverifiedShow Answer

When two or more atoms (reactants)bond to form a more complex structure (product)the reaction is called synthesis.

Correct AnswerverifiedShow Answer

A covalent bond is formed by two atoms that share electrons.

Correct AnswerverifiedShow Answer

The electrons of an atom occupy one or more areas of space called

Correct AnswerverifiedShow Answer

Sodium and chloride ions readily combine because they have opposite charges.

Correct AnswerverifiedShow Answer

Inorganic substances that usually dissociate in water are called

Correct AnswerverifiedShow Answer

A molecule of a compound always contains definite kinds and numbers of atoms.

Correct AnswerverifiedShow Answer

Water accounts for 2/3 of the weight of an adult human.

Correct AnswerverifiedShow Answer

Steroid molecules have four connected rings of carbon atoms.

Correct AnswerverifiedShow Answer

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