Question 1

Sodium has 11 electrons arranged in three energy levels.The outer level has only one electron.In order to become stable,the atom loses an electron thus exposing the previous level with 8 electrons and subsequently becomes an ion with

Accepted Answer

A)  1 negative charge.
B)  no charge.
C)  8 negative charges.
D)  1 positive charge.
E)  8 positive charges.F) A) and C)
G) C) and D)

Question 2

A scientist conducts a procedure that causes nitrogen atoms to gain neutrons.The resulting atoms will be

Accepted Answer

A)  ions of nitrogen.
B)  positively charged.
C)  negatively charged.
D)  isotopes of nitrogen.
E)  new elements with higher atomic numbers.F) A) and D)
G) B) and C)

Question 3

Organisms are composed of molecules,which are collections of smaller units,called

Accepted Answer

A)  molecules.
B)  atoms.
C)  electrons.
D)  polymers.
E)  ions.F) All of the above
G) B) and D)

Question 4

Nuclear particle;positive charge.

Accepted Answer

A)  electron
B)  ion
C)  isotope
D)  neutron
E)  protonF) C) and D)
G) B) and E)

Question 5

Because oxygen is more electronegative than hydrogen,the water molecule is

Accepted Answer

A)  hydrophobic.
B)  hydrophilic.
C)  organiC.
D)  ionic.
E)  polar.F) A) and E)
G) B) and E)

Question 6

Nuclear particle;no negative charge.

Accepted Answer

A)  electron
B)  ion
C)  isotope
D)  neutron
E)  protonF) B) and C)
G) D) and E)

Question 7

All of the substances of the universe that have mass and occupy space are defined as __________.

Accepted Answer

A)  matter
B)  energy
C)  mass
D)  moleculesE) All of the above
F) A) and D)

Question 8

When atoms gain or lose electrons,they become negatively or positively charged.They are known as

Accepted Answer

A)  molecules.
B)  isotopes.
C)  ions.
D)  radioactive.
E)  unstable atoms.F) B) and E)
G) A) and D)

Question 9

Which of the following statements about orbitals is false?

Accepted Answer

A)  They correlate with the number of protons in the nucleus.
B)  They cannot contain more than two electrons.
C)  They contain electrons of the same energy.
D)  They are paths around the nucleus in which the electrons orbit.E) A) and B)
F) All of the above

Question 10

When water ionizes,it produces equal amounts of hydrogen and hydroxide ions,which can reassociate with each other.Water is thus a(n)

Accepted Answer

A)  acid.
B)  base.
C)  alkali.
D)  base and an aciD.
E)  buffer.F) A) and B)
G) A) and D)

Question 11

Atoms in which the number of electrons does not equal the number of protons are known as

Accepted Answer

A)  valences.
B)  ions.
C)  isotopes.
D)  molecules.
E)  orbitals.F) A) and B)
G) B) and C)

Question 12

Two carbon atoms might be joined to each other by the sharing of two pairs of electrons,forming a(n)

Accepted Answer

A)  single bond.
B)  ionic bond.
C)  carbon bond.
D)  double bonD.
E)  quadruple (4 point) bond.F) A) and B)
G) A) and C)

Question 13

Atom is negatively charged because it has accepted an electron.

Accepted Answer

A)  electron
B)  ion
C)  isotope
D)  neutron
E)  protonF) A) and E)
G) A) and D)

Exam 2: The Nature of Molecules

Two carbon atoms might be joined to each other by the sharing of two pairs of electrons,forming a(n)

Correct Answer
verified

Nuclear particle;positive charge.

Correct Answer
verified

Because oxygen is more electronegative than hydrogen,the water molecule is

Correct Answer
verified

Which of the following statements about orbitals is false?

Correct Answer
verified

When water ionizes,it produces equal amounts of hydrogen and hydroxide ions,which can reassociate with each other.Water is thus a(n)

Correct Answer
verified

All of the substances of the universe that have mass and occupy space are defined as __________.

Correct Answer
verified

A scientist conducts a procedure that causes nitrogen atoms to gain neutrons.The resulting atoms will be

Correct Answer
verified

Organisms are composed of molecules,which are collections of smaller units,called

Correct Answer
verified

Nuclear particle;no negative charge.

Correct Answer
verified

When atoms gain or lose electrons,they become negatively or positively charged.They are known as

Correct Answer
verified

Sodium has 11 electrons arranged in three energy levels.The outer level has only one electron.In order to become stable,the atom loses an electron thus exposing the previous level with 8 electrons and subsequently becomes an ion with

Correct Answer
verified

Atom is negatively charged because it has accepted an electron.

Correct Answer
verified

Atoms in which the number of electrons does not equal the number of protons are known as

Correct Answer
verified

Exam 2: The Nature of Molecules

Two carbon atoms might be joined to each other by the sharing of two pairs of electrons,forming a(n)

Correct AnswerverifiedShow Answer

Nuclear particle;positive charge.

Correct AnswerverifiedShow Answer

Because oxygen is more electronegative than hydrogen,the water molecule is

Correct AnswerverifiedShow Answer

Which of the following statements about orbitals is false?

Correct AnswerverifiedShow Answer

When water ionizes,it produces equal amounts of hydrogen and hydroxide ions,which can reassociate with each other.Water is thus a(n)

Correct AnswerverifiedShow Answer

All of the substances of the universe that have mass and occupy space are defined as __________.

Correct AnswerverifiedShow Answer

A scientist conducts a procedure that causes nitrogen atoms to gain neutrons.The resulting atoms will be

Correct AnswerverifiedShow Answer

Organisms are composed of molecules,which are collections of smaller units,called

Correct AnswerverifiedShow Answer

Nuclear particle;no negative charge.

Correct AnswerverifiedShow Answer

When atoms gain or lose electrons,they become negatively or positively charged.They are known as

Correct AnswerverifiedShow Answer

Sodium has 11 electrons arranged in three energy levels.The outer level has only one electron.In order to become stable,the atom loses an electron thus exposing the previous level with 8 electrons and subsequently becomes an ion with

Correct AnswerverifiedShow Answer

Atom is negatively charged because it has accepted an electron.

Correct AnswerverifiedShow Answer

Atoms in which the number of electrons does not equal the number of protons are known as

Correct AnswerverifiedShow Answer

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