Which Statements About Hydrogen Are True

question 90

Multiple Choice

Which statements about hydrogen are true?
I. H has a lower ionization energy than He.
II. H^- is smaller than H.
III. H has a higher effective nuclear charge than He.
IV. H is always a metal.
V. H does not have a second ionization energy.

• A) II, IV, V
• B) I, III, V
• C) I, III, IV, V
• D) I, V
• E) II, IV

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Definitions:

Lipids

A group of naturally occurring molecules that include fats, waxes, and certain vitamins, essential for energy storage and cell membrane structure.

Vitamin A

A fat-soluble vitamin important for normal vision, immune function, and reproduction.

Bones

The hard, dense organs that form the framework of the human body, essential for movement, protection of internal organs, and storage of minerals.

Teeth

Hard, calcified structures in the mouth used for biting and chewing food, also playing a role in speech.