Which of the following statements regarding hydrogen bonding is true?

a. a hydrogen bond forms when a positively charged hydrogen ion bonded to a negatively charged atom.

b. hydrogen bonding is possible when hydrogen is in a polar covalent bond.

c. a hydrogen bond forms when a partially negative hydrogen is attracted to a partially positive oxygen.

d. a hydrogen bond is a type of polar covalent bond.

yes it is weird but true

one part of the electromagnetic spectrum that arrives on earth as solar radiation from the sun is the visible spectrum. wavelengths of the visible spectrum combine to form what we refer to as

answer - d) ultraviolet radiation.

violet /   380–450 nm / 668–789 thz

violet is number 1 in the chart of visible light.

answer///(c) the maximum number of organisms an environment can support for a long time; i believe this is correct, plz check luck;