Exam 2: Lifes Chemical Basis

The column of water extending in tubes from plant roots to leaves is maintained by ____.

The various energy levels in an atom of magnesium (²⁴Mg) have different numbers of electrons. Use the numbers below to answer the following question. -The number of electrons in the third energy level

The following are important terms relating to acids and bases. Answer the question below by matching the description with the most appropriate word.​ -Set of chemicals that stabilizes pH

Blood pH is kept near a value of 7.3 - 7.5 because of ____.

The following are types of chemical bonds. Answer the question below by matching the descriptions with the most appropriate bond type -The bond that breaks when salts dissolve in water

Figure 2.4C -Which atom is depicted in the accompanying figure?

Radioactive isotopes have ____.

Carbon dioxide is an example of a(n) ____.

Figure 2.9B -The dashed line in the accompanying figure represents a(n) ____.

In covalent bonds, ____.

The following are important terms relating to acids and bases. Answer the question below by matching the description with the most appropriate word.​ -Substance that releases, but does not accept, H⁺

Water is important to the interactions of biological molecules because it ____.

Atoms with a(n) ____ are more likely to form chemical bonds.

Figure 2.4B -Which atom is depicted in the accompanying figure?

Atoms become ____ in order to achieve a full outer orbital shell.

Nitrogen, with an atomic number of 7, has ____ electron(s) in the first energy level and ____ electrons in the second energy level.

The following are important terms relating to acids and bases. Answer the question below by matching the description with the most appropriate word.​ -Lemon juice

The ability of a solution to resist changes in pH depends on its ____________________ capacity.

The nucleus of an atom contains ____.

Figure 2.4A​ -Based on its outer shell, the atom in the accompanying figure would be characterized as ____.