Above What Atomic Number Are There No Stable Isotopes of Any

question 133

Multiple Choice

Above what atomic number are there no stable isotopes of any element?

• A) 20
• B) 92
• C) 83
• D) 60
• E) 89

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Definitions:

IgG

A type of antibody found in all body fluids and the most abundant type of antibody in the human body, playing a crucial role in pathogen defense.

Passive Immunity

Immunity acquired by the transfer of antibodies from another individual, as through maternal antibodies passed to the fetus or by the administration of antibody-containing substances.

Placenta

An organ that develops in the uterus during pregnancy, providing oxygen and nutrients to the growing fetus while removing waste products.

IgA

Immunoglobulin A serves an indispensable role in the defense mechanisms of mucous membranes as a specific form of antibody.