The Lanthanide Contraction Results Because

question 90

Multiple Choice

The lanthanide contraction results because

• A) the shielding effect of the d-electrons is less than that of the f-electrons.
• B) the shielding effect of the d-electrons is greater than that of the f-electrons.
• C) of the poor shielding effect of the f-electrons and the higher nuclear charge.
• D) the d-electrons shield the f-electrons from the nucleus.
• E) f-electrons interact more strongly with each other than d-electrons.

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Definitions:

Hematocrit

The ratio of the volume of red blood cells to the total volume of blood, expressed as a percentage, used to diagnose and treat various conditions.

Red Blood Cells

Biconcave, disc-shaped cells without nuclei, present in the blood, whose principal function is to transport oxygen from the lungs to body tissues.

Blood

A vital fluid in the body that delivers necessary substances such as nutrients and oxygen to the cells and transports metabolic waste products away from those same cells.

Coagulates

The process by which a fluid, especially blood, changes to a solid or semi-solid state, often to stop bleeding.