Question 1

You drop a handful of common table salt into a glass of water. Which of the following best describes what is happening inside the glass at the molecular level?

Accepted Answer

A)   The positively charged hydrogen ends of the water molecules are attracted to sodium ions.
B)   Sodium and chloride ions form a covalent bond.
C)   The positively charged hydrogen ends of the water molecules are attracted to chloride ions.
D)   Water and sodium form a covalent bond.

Question 2

Which of the following results from a transfer of electron(s)  between atoms (e.g., NaCl) ?

Accepted Answer

A)   Nonpolar covalent bond
B)   Polar covalent bond
C)   Ionic bond
D)   Hydrogen bond
E)   Electron- proton interaction

Question 3

Atoms or molecules that have gained or lost electrons are called

Accepted Answer

A)   covalent.
B)   acids.
C)   ions.
D)   buffers.
E)   bases.

Question 4

The formation of sodium chloride (NaCl)  is the result of

Accepted Answer

A)   repelling between the same charges.
B)   covalent bonding.
C)   chemical unreactivity.
D)   attraction between opposite charges.

Question 5

If you examined the human body on a chemical composition basis, which of the following combinations of elements would be most common?

Accepted Answer

A)   O, C, N, Na
B)   C, H, Ca, Cl
C)   C, N, Ca, S
D)   O, C, H, N
E)   O, C, P, S

Question 6

The atomic number of an atom is defined as the

Accepted Answer

A)   total number of energy shells.
B)   number of protons in the atomic nucleus.
C)   number of electrons in the outermost energy level.
D)   total number of electrons and neutrons.
E)   number of neutrons in the atomic nucleus.

Question 7

What type of bond is easily disrupted in aqueous solutions (one in which the solvent is water) ?

Accepted Answer

A)   Ionic
B)   Covalent
C)   Polar covalent

Question 8

If you place a paper towel in a dish of water, the water will

Accepted Answer

A)   move away from the towel because water molecules have hydrophobic interactions.
B)   move up the towel because water molecules move quickly as it vaporizes.
C)   dissolve the towel because water is a good solvent.
D)   move up the towel as the water adheres to the paper towel while the cohesive water molecules stay bound to each other.
E)   separate into H+ and OH- ions, which will react with the paper towel molecules.

Question 9

Sodium (Na) , atomic number 11, has a tendency to lose an electron in the presence of chlorine. After losing the electron, Na has protons in its nucleus.

Accepted Answer

A)   21
B)   22
C)   11
D)   10
E)   12

Question 10

Milk of magnesia is often used to treat stomach upset. It has a pH of 10. Based on this information, milk of magnesia

Accepted Answer

A)   has the same pH as stomach acid.
B)   is hydrophobic.
C)   is an acid.
D)   is a base.

Exam 2: Atoms, Molecules, and Life

The atomic number of an atom is defined as the

Correct Answer
verified

If you examined the human body on a chemical composition basis, which of the following combinations of elements would be most common?

Correct Answer
verified

The formation of sodium chloride (NaCl) is the result of

Correct Answer
verified

What type of bond is easily disrupted in aqueous solutions (one in which the solvent is water) ?

Correct Answer
verified

You drop a handful of common table salt into a glass of water. Which of the following best describes what is happening inside the glass at the molecular level?

Correct Answer
verified

Milk of magnesia is often used to treat stomach upset. It has a pH of 10. Based on this information, milk of magnesia

Correct Answer
verified

Atoms or molecules that have gained or lost electrons are called

Correct Answer
verified

Which of the following results from a transfer of electron(s) between atoms (e.g., NaCl) ?

Correct Answer
verified

If you place a paper towel in a dish of water, the water will

Correct Answer
verified

Sodium (Na) , atomic number 11, has a tendency to lose an electron in the presence of chlorine. After losing the electron, Na has protons in its nucleus.

Correct Answer
verified

Exam 2: Atoms, Molecules, and Life

The atomic number of an atom is defined as the

Correct AnswerverifiedShow Answer

If you examined the human body on a chemical composition basis, which of the following combinations of elements would be most common?

Correct AnswerverifiedShow Answer

The formation of sodium chloride (NaCl) is the result of

Correct AnswerverifiedShow Answer

What type of bond is easily disrupted in aqueous solutions (one in which the solvent is water) ?

Correct AnswerverifiedShow Answer

You drop a handful of common table salt into a glass of water. Which of the following best describes what is happening inside the glass at the molecular level?

Correct AnswerverifiedShow Answer

Milk of magnesia is often used to treat stomach upset. It has a pH of 10. Based on this information, milk of magnesia

Correct AnswerverifiedShow Answer

Atoms or molecules that have gained or lost electrons are called

Correct AnswerverifiedShow Answer

Which of the following results from a transfer of electron(s) between atoms (e.g., NaCl) ?

Correct AnswerverifiedShow Answer

If you place a paper towel in a dish of water, the water will

Correct AnswerverifiedShow Answer

Sodium (Na) , atomic number 11, has a tendency to lose an electron in the presence of chlorine. After losing the electron, Na has protons in its nucleus.

Correct AnswerverifiedShow Answer

Correct Answer
verified

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