Question

question 2
according to the article, what causes water molecules to join together?
a. the molecule has a perfectly spherical shape.
b. the molecule has opposite charges on each end.
c. the atoms in the molecule are chemically bonded.
d. the atoms in the molecule spread apart when frozen.

Explanation:

To determine the cause of water molecules joining together, we analyze each option:

• Option A: Water molecules are not perfectly spherical; they have a bent shape, so this is incorrect.
• Option B: Water is a polar molecule, with a partially positive end (near hydrogen atoms) and a partially negative end (near the oxygen atom). The opposite charges on different water molecules lead to hydrogen bonding, which causes them to join together. This is correct.
• Option C: Chemical bonding within a water molecule (covalent bonds between H and O) holds the molecule together, but it does not explain why different water molecules join. So this is incorrect.
• Option D: The spreading of atoms when frozen (expansion of water upon freezing) is a result of the arrangement of molecules in ice, not the cause of water molecules joining together. So this is incorrect.

Answer:

B. The molecule has opposite charges on each end.