Which of the following is not considered to be a weak molecular interaction?

Which of the following is not considered to be a weak molecular interaction?  A) a covalent bond B) a van der Waals interaction C) an ionic...

What bonding or interaction is most likely to occur among a broad array of molecules of various types (polar, nonpolar, hydrophilic, hydrophobic)?

What bonding or interaction is most likely to occur among a broad array of molecules of various types (polar, nonpolar, hydrophilic, hydrophobic)?  A)...

Van der Waals interactions result when

Van der Waals interactions result when  A) hybrid orbitals overlap. B) electrons are not symmetrically distributed in a molecule. C) molecules...

Which of the following explains most specifically the attraction of water molecules to one another?

Which of the following explains most specifically the attraction of water molecules to one another?  A) nonpolar covalent bond B) polar covalent...

Which bond or interaction would be difficult to disrupt when compounds are put into water?

Which bond or interaction would be difficult to disrupt when compounds are put into water?  A) covalent bond B) hydrogen bond C) van der Waals...

How many electron pairs are shared between carbon atoms in a molecule that has the formula C2H4?

How many electron pairs are shared between carbon atoms in a molecule that has the formula C2H4?  A) 0 B) 1 C) 2 D) 3 E) 4 Answer:...

The atomic number of chlorine is 17. The atomic number of magnesium is 12. What is the formula for magnesium chloride?

The atomic number of chlorine is 17. The atomic number of magnesium is 12. What is the formula for magnesium chloride?  A) MgCl B) MgCl2 C)...

In ammonium chloride salt (NH4Cl) the anion is a single chloride ion, Cl. What is the cation of NH4Cl?

In ammonium chloride salt (NH4Cl) the anion is a single chloride ion, Cl. What is the cation of NH4Cl?  A) N, with a charge of +1 B) NH, with...

What is the difference between covalent bonds and ionic bonds?

What is the difference between covalent bonds and ionic bonds?  A) Covalent bonds are formed between atoms to form molecules; ionic bonds...

In comparing covalent bonds and ionic bonds, which of the following would you expect?

In comparing covalent bonds and ionic bonds, which of the following would you expect?  A) An atom can form covalent bonds with multiple partner...

Which of the following molecules contains the most polar covalent bond?

Which of the following molecules contains the most polar covalent bond?  A) H2 B) O2 C) CO2 D) H2O E) CH4 Answer:...

A covalent bond is likely to be polar when

A covalent bond is likely to be polar when  A) one of the atoms sharing electrons is much more electronegative than the other atom. B) the...

What results from an unequal sharing of electrons between atoms?

What results from an unequal sharing of electrons between atoms?  A) a nonpolar covalent bond B) a polar covalent bond C) an ionic bond D)...

When two atoms are equally electronegative, they will interact to form

When two atoms are equally electronegative, they will interact to form  A) hydrogen bonds. B) van der Waals interactions. C) polar covalent...

Nitrogen (N) is much more electronegative than hydrogen (H). Which of the following statements is correct about the atoms in ammonia (NH3)?

Nitrogen (N) is much more electronegative than hydrogen (H). Which of the following statements is correct about the atoms in ammonia (NH3)?  A)...

What is the maximum number of covalent bonds an element with atomic number 8 can make with hydrogen?

What is the maximum number of covalent bonds an element with atomic number 8 can make with hydrogen?  A) 1 B) 2 C) 3 D) 4 E) 6 Answer:...

A covalent chemical bond is one in which

A covalent chemical bond is one in which  A) electrons are removed from one atom and transferred to another atom so that the two atoms become...

If a salamander relied on hydrogen bonds to cling to surfaces, what type of surface would cause the most problems for this animal?

If a salamander relied on hydrogen bonds to cling to surfaces, what type of surface would cause the most problems for this animal?  A) a surface...

An atom with atomic number 12 would have what type of chemical behavior in bonding with other elements?

An atom with atomic number 12 would have what type of chemical behavior in bonding with other elements?  A) It would form ions with a +1 charge. B)...

Phosphorus-32, a radioactive isotope of phosphorus-31 (atomic number 15), undergoes a form of radioactive decay whereby a neutron turns into a proton and emits radiation in the form of an electron. What is the product of such radioactive decay of phosphorus-32?

Phosphorus-32, a radioactive isotope of phosphorus-31 (atomic number 15), undergoes a form of radioactive decay whereby a neutron turns into a proton...

The organic molecules in living organisms have a measurably lower ratio of carbon-13/carbon-12, two stable isotopes of carbon that comprise approximately 1.1% and 98.9% of atmospheric carbon, respectively. What is a reasonable explanation for this phenomenon?

The organic molecules in living organisms have a measurably lower ratio of carbon-13/carbon-12, two stable isotopes of carbon that comprise approximately...

What is the maximum number of electrons in a single 2 p orbital of an atom?

What is the maximum number of electrons in a single 2 p orbital of an atom?  A) 1 B) 2 C) 3 D) 4 E) 5 Answer:...

Fluorine has an atomic number of 9 and a mass number of 19. How many electrons are needed to complete the valence shell of a fluorine atom?

Fluorine has an atomic number of 9 and a mass number of 19. How many electrons are needed to complete the valence shell of a fluorine atom?  A)...

Two atoms appear to have the same mass number. These atoms

Two atoms appear to have the same mass number. These atoms  A) must have the same atomic number. B) must have the same number of electrons. C)...

The atomic number of each atom is given to the left of each of the elements below. Which of the atoms has the same valence as carbon (12/6 C)?

The atomic number of each atom is given to the left of each of the elements below. Which of the atoms has the same valence as carbon (12/6 C)?  A)...

Atoms whose outer electron shells contain 8 electrons tend to

Atoms whose outer electron shells contain 8 electrons tend to  A) form ions in aqueous solutions. B) form hydrogen bonds in aqueous solutions. C)...

From its atomic number of 15, it is possible to predict that the phosphorus atom has

From its atomic number of 15, it is possible to predict that the phosphorus atom has  A) 15 neutrons. B) 15 protons. C) 15 electrons. D) 8...

The atomic number of neon is 10. Therefore, which of the following is most correct about an atom of neon?

The atomic number of neon is 10. Therefore, which of the following is most correct about an atom of neon?  A) It has 8 electrons in its outer...

Electrons exist only at fixed levels of potential energy. However, if an atom absorbs sufficient energy, a possible result is that

Electrons exist only at fixed levels of potential energy. However, if an atom absorbs sufficient energy, a possible result is that  A) an...

The atomic number of nitrogen is 7. Nitrogen-15 is heavier than nitrogen-14 because the atomic nucleus of nitrogen-15 contains how many neutrons?

The atomic number of nitrogen is 7. Nitrogen-15 is heavier than nitrogen-14 because the atomic nucleus of nitrogen-15 contains how many neutrons?  A)...

An atom has 6 electrons in its outer shell. How many unpaired electrons does it have?

An atom has 6 electrons in its outer shell. How many unpaired electrons does it have?  A) 0 B) 2 C) 4 D) 6 E) 2 or 4 Answer:...

One difference between carbon-12 (12/6 C) is that carbon-14 (14/6 C) has

One difference between carbon-12 (12/6 C) is that carbon-14 (14/6 C) has  A) two more protons than carbon-12. B) two more electrons than carbon-12. C)...

The precise weight of a mole of some pure elements like silicon (Si) can vary slightly from the standard atomic mass, or even from sample to sample. Why?

The precise weight of a mole of some pure elements like silicon (Si) can vary slightly from the standard atomic mass, or even from sample to sample....

Carbon-12 is the most common isotope of carbon, and has an atomic mass of 12 daltons. A mole of carbon in naturally occurring coal, however, weighs slightly more than 12 grams. Why?

Carbon-12 is the most common isotope of carbon, and has an atomic mass of 12 daltons. A mole of carbon in naturally occurring coal, however, weighs...

Molybdenum has an atomic number of 42. Several common isotopes exist, with mass numbers of 92, 94, 95, 96, 97, 98, and 100. Therefore, which of the following can be true?

Molybdenum has an atomic number of 42. Several common isotopes exist, with mass numbers of 92, 94, 95, 96, 97, 98, and 100. Therefore, which of the...

The nucleus of a nitrogen atom contains 7 neutrons and 7 protons. Which of the following is a correct statement concerning nitrogen?

The nucleus of a nitrogen atom contains 7 neutrons and 7 protons. Which of the following is a correct statement concerning nitrogen?  A) The...

Oxygen has an atomic number of 8 and a mass number of 16. Thus, what is the atomic mass of an oxygen atom?

Oxygen has an atomic number of 8 and a mass number of 16. Thus, what is the atomic mass of an oxygen atom?  A) exactly 8 grams B) exactly...

In what way are elements in the same column of the periodic table the same?

In what way are elements in the same column of the periodic table the same?  A) They have the same number of protons. B) They have the same...

Knowing just the atomic mass of an element allows inferences about which of the following?

Knowing just the atomic mass of an element allows inferences about which of the following?  A) the chemical properties of the element B) the...

Why is each element unique and different from other elements in chemical properties?

Why is each element unique and different from other elements in chemical properties?  A) Each element has a unique atomic mass. B) Each element...

What factors are most important in determining which elements are most common in living matter?

What factors are most important in determining which elements are most common in living matter?  A) the relative abundances of the elements...

Which of the following statements is false?

Which of the following statements is false?  A) Carbon, hydrogen, oxygen, and nitrogen are the most abundant elements of living matter. B)...

Trace elements are those required by an organism in only minute quantities. Which of the following is a trace element that is required by humans and other vertebrates, but not by other organisms such as bacteria or plants?

Trace elements are those required by an organism in only minute quantities. Which of the following is a trace element that is required by humans and...

About 25 of the 92 natural elements are known to be essential to life. Which four of these 25 elements make up approximately 96% of living matter?

About 25 of the 92 natural elements are known to be essential to life. Which four of these 25 elements make up approximately 96% of living matter?  A)...

Which of the following best describes the logic of scientific inquiry?

Which of the following best describes the logic of scientific inquiry?  A) If I generate a testable hypothesis, tests and observations will...

Which of the following is an example of qualitative data?

Which of the following is an example of qualitative data?  A) The temperature decreased from 20°C to 15°C. B) The plant's height is 25 centimeters...

Which of the following statements best distinguishes hypotheses from theories in science?

Which of the following statements best distinguishes hypotheses from theories in science? A) Theories are hypotheses that have been proved. B) Hypotheses...

A controlled experiment is one that

A controlled experiment is one that  A) proceeds slowly enough that a scientist can make careful records of the results. B) tests experimental...

Which of the following best demonstrates the unity among all organisms?

Which of the following best demonstrates the unity among all organisms?  A) matching DNA nucleotide sequences B) descent with modification C)...

Protists and bacteria are grouped into different domains because

Protists and bacteria are grouped into different domains because  A) protists eat bacteria. B) bacteria are not made of cells. C) protists...

Systems biology is mainly an attempt to

Systems biology is mainly an attempt to  A) analyze genomes from different species. B) simplify complex problems by reducing the system into...