AP BIOLOGY

Detailed explanation-1: -In the case of water, hydrogen bonds form between neighboring hydrogen and oxygen atoms of adjacent water molecules. The attraction between individual water molecules creates a bond known as a hydrogen bond.

Detailed explanation-2: -Strong linkages-called covalent bonds-hold together the hydrogen (white) and oxygen (red) atoms of individual H2O molecules. Covalent bonds occur when two atoms-in this case oxygen and hydrogen-share electrons with each other.

Detailed explanation-3: -Explanation: Hydrogen bonds form between water molecules. Hydrogen bonds occur because of the polarity of the bond between hydrogen and oxygen atoms. The partially positive hydrogen atoms of one water molecule are attracted to the partially negative oxygen atoms of two other water molecules.

Detailed explanation-4: -A molecule of water has two hydrogen atoms. Both of these atoms can form a hydrogen bond with oxygen atoms of different water molecules. Every water molecule can be hydrogen bonded with up to three other water molecules (See Fig.

Detailed explanation-5: -Hydrogen and oxygen respectively combine together in the ratio of 1:8 by mass to form water.