Ch. 2 Chemical Principles Adaptive Follow-Up

Which part(s) of the molecule is/are considered non-polar?

B and C

Which of the following would most easily pass through a phospholipid bilayer? the cation Na+ the anion Cl- polar molecules like glucose and amino acids H2O CH4

CH4

Which type of subatomic particle is not included in an atom's mass number?

Electrons

Which type of subatomic particle orbits around the nucleus?

Electrons

Which of the following is not a correct statement about ionic bonding? Ions are formed first, and then their opposite electric charges draw the atoms close, forming the bond. Electrons are shared between the two atoms. Ionic bonds produce compounds. Valence electrons are either gained or lost.

Electrons are shared between the two atoms.

Which of the following is not a true statement about covalent bonding? In nonpolar covalent bonds, electrons are shared unequally. It occurs when atoms share valence electrons to become stable. It forms strong chemical bonds. Polar covalent bonds produce molecules with slight electrical charges.

In nonpolar covalent bonds, electrons are shared unequally.

Think about a 10% saline solution (Saline refers to salt.). Which of the following is a correct statement?

It contains 10% solute and 90% solvent.

Which of the following best characterizes a hydrogen bond? It forms only between nonpolar molecules. It is formed only between different molecules (intermolecular). It is a weak and temporary electrical attraction between two polar molecules. It is a strong chemical bond formed by the sharing of valence electrons.

It is a weak and temporary electrical attraction between two polar molecules

Sort the following molecules based on whether they are polar or non-polar. C-H O=O H-N O-H H-H

Polar Covalent: H-N O-H Non-polar Covalent: C-H O=O H-H

Which of the following is true of nonpolar molecules? They are larger than polar molecules. They include the electrolytes. They are formed by unequal sharing of electrons. Water molecules are not nonpolar.

Water molecules are not nonpolar.

In a water molecule, the oxygen atom contains __________ charge, and the hydrogen exhibits __________ charge.

a partially negative; a partially positive

Consider sweetened ice tea. Which of the following is a solute?

sugar

A covalent bond results from __________.

the sharing of electrons between two atoms