The Diameter of a Mercury Atom, Atomic Number 80, Compared

question 202

Multiple Choice

The diameter of a mercury atom, atomic number 80, compared with the diameter of a zirconium atom, atomic number 40, is approximately

• A)half as large
• B)twice as large
• C)the same size
• Because the
• D)atomic masses are not appreciably different.
• E)greater nuclear charge pulls the orbiting electrons closer.
• F)atomic number and atomic diameter are directly proportional to each other.
• G)atomic number and atomic diameter are inversely proportional to each other.

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Definitions:

Lens

A piece of transparent material with at least one curved surface, used to focus or disperse light and form images.

Iris

The colored part of the eye that controls the size of the pupil and the amount of light reaching the retina.

Colored Part

The iris, the circular structure in the eye responsible for controlling the diameter and size of the pupils and thus the amount of light reaching the retina.

Pupil Size

The diameter of the circular opening in the center of the iris of the eye, which can vary in response to light exposure or emotional state.