In Feldspars, What Element Can Be Thought of as Substituting

question 56

Multiple Choice

In feldspars, what element can be thought of as substituting for silicon in the tetrahedral ionic sites?

• A) potassium
• B) aluminum
• C) sodium
• D) carbon

---

Definitions:

Active Immunity

Immunity developed by the body after exposure to a pathogen or through vaccination, leading to the production of antibodies.

Antibodies

Proteins produced by the immune system to identify and neutralize foreign objects like bacteria and viruses.

Mother To Fetus

The transmission of substances or conditions from the pregnant individual to the developing fetus through the placenta, affecting fetal health and development.

Cell-Mediated Immunity

An immune response that does not involve antibodies but rather involves the activation of phagocytes, antigen-specific cytotoxic T-lymphocytes, and the release of various cytokines in response to an antigen.