Exam 2: Atoms, Molecules, and Life

The chemical properties of an element are determined by the number of _________in its outermost energy shell.

What determines the cohesiveness of water molecules?

A substance with specific properties that cannot be broken down or converted into another substance is called a(n)

Which of the following best explains why a particular atom may not form compounds easily?

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

Iron is an important element in human body cells. If iron has an atomic number of 26, what does this tell you about this element?

If a certain atom has a tendency to lose two electrons, that atom can then become a(n)

Unlike a rock, a reptile can sit in the hot sunshine without its body temperature soaring quickly. This is because the water in its body

The formation of ions involves the

Which of these atoms would become inert if it accepted three electrons?

Polar molecules

Hydrophilic molecules

Polar covalent bonds form when

When the acidic level of human blood increases, how is the proper balance of hydrogen ions (H ⁺) restored?

The element carbon has atomic number 6. Carbon most likely

The fact that salt dissolves in water is best explained by the

Your friend does a belly flop into a swimming pool. The stinging pain he feels is most likely due to the

Imagine that you have been hired as a chemist and your first task is to examine a newly discovered atom. The paperwork you are given states that its atomic number is 110. What does this mean?

If a substance measures 7 on the pH scale, that substance

Ions and polar molecules that are electrically attracted to water molecules are_________ .