Question 1

Which of the following best explains why noble gases such as helium and neon are chemically inert?

Accepted Answer

Their outermost electron shell is completely filled.

Question 2

A patient receives an intravenous solution containing glucose dissolved in water. In this scenario, which is the solvent and which is the solute?

Accepted Answer

Water is the solvent; glucose is the solute.

Question 3

Which of the following mixtures is best described as a colloid?

Accepted Answer

Jell-O

Question 4

What is the maximum number of electrons that can occupy the third electron shell of an atom, according to the formula $$2(n^2$$)$$?

Accepted Answer

$$18$$

Question 5

Which of the following statements about chemical bonds is correct?

Accepted Answer

Covalent bonds involve the sharing of electrons between atoms.

Question 6

A molecule of water ($$H_2O) is $$considered polar because:

Accepted Answer

Oxygen is more electronegative, creating a partial negative charge on the oxygen atom.

Question 7

Which of the following best describes a suspension?

Accepted Answer

A mixture where large, visible solutes settle out over time.

Question 8

Which of the following is a real-life example of a hydrogen bond's effect?

Accepted Answer

A water strider walking on the surface of a pond

Question 9

Which of the following statements about mixtures and compounds is FALSE?

Accepted Answer

Mixtures always involve chemical bonding between components.

Question 10

A sodium atom ($$Na) $$reacts with a chlorine atom ($$Cl) to $$form sodium chloride ($$NaCl). $$What type of bond is formed, and what happens to the electrons?

Accepted Answer

An ionic bond is formed by transferring an electron from sodium to chlorine.

Question 11

Which of the following molecules is an example of a nonpolar covalent bond?

Accepted Answer

Carbon dioxide ($$CO_2)$$

Question 12

Which of the following best describes the octet rule?

Accepted Answer

Atoms tend to have 8 electrons in their valence shell to achieve stability.

Question 13

Which of the following is the correct order of bond strength from strongest to weakest?

Accepted Answer

Covalent bond \u003e Ionic bond \u003e Hydrogen bond

Question 14

A protein's three-dimensional shape is maintained by which type of bond?

Accepted Answer

Hydrogen bonds

Question 15

Which of the following best describes van der Waals interactions?

Accepted Answer

Weak attractions due to temporary regions of positive and negative charge

Question 16

Which of the following is a property of a solution?

Accepted Answer

Solute particles are tiny and do not settle out or scatter light.

Question 17

Which of the following best explains why blood is considered a suspension?

Accepted Answer

Blood cells are large, visible solutes that settle out if left undisturbed.

Question 18

Which of the following is true regarding polar covalent bonds?

Accepted Answer

Atoms have different electron-attracting abilities, resulting in partial charges.

Question 19

Which of the following is a real-world application of the octet rule?

Accepted Answer

Sodium losing one electron to achieve a full valence shell, forming $$Na^+.$$

Question 20

Which of the following best describes the difference between a mixture and a compound?

Accepted Answer

Mixtures can be heterogeneous or homogeneous, while compounds are always homogeneous.

Atoms, Molecules, and Chemical Bonds: Foundations for Anatomy & Physiology

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