Chap 2 Exit Quiz

Which of the following molecules would one expect to have a non-polar covalent bond?

• HCl

• ClF

• HF

What feature of water molecules enables ionic substance to dissolve in water?

• The water molecules are polar and are attracted to the positive and negative ions, surrounding them.

• The water molecules react with the ions.

• The water molecules are sticky and can adhere to the ions.

• The water molecules have a certain shape that allows them to surround the ions in solution.

What two particles compose the nucleus of an atom?

• Neutron and proton

• Positron and electron

• Neutron and electron

• Neutron and proton

Which of the following describes the most likely way in which two water molecules will interact?

• An ionic bond will form between the oxygens in each water molecule.

• A hydrogen bond will form between the hydrogen atom of one water molecule and the oxygen atom of the other water molecule.

• A covalent bond will form between the hydrogen of one water molecule and the oxygen of the other water molecule.

• A metallic bond will form between the hydrogens in each water molecule.

Which of the following biological activities best demonstrates water’s adhesive properties?

• Water evaporates from leaves through openings called stomata, which open and close in response to environmental conditions.

• The vacuole of a plant cell swells as water enters and dilutes its contents.

• Water travels through vascular tissue from the roots to the leaves of a plant, moving against the force of gravity.

• A leaf’s cuticle, or waxy outer coating, repels water droplets.

How do the nuclei of Carbon 14 and Carbon 12 differ?

• Carbon 14 has 2 less protons

• Carbon 12 has 2 less neutrons

• Carbon 14 has 2 less electrons

• They have the same nucleus composition