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This Element Reacts with Hydrogen to Produce a Gas with the Formula

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This element reacts with hydrogen to produce a gas with the formula HX. When dissolved in water, HX forms an acidic solution. X is _,


Definitions:

Reproductive Strategy

A biological concept referring to the behaviors and mechanisms organisms use to produce offspring and ensure their survival.

Psychosexual Development

Freud's theory that describes how personality develops through five stages (oral, anal, phallic, latency, genital) during childhood.

Socialization

The process by which individuals acquire the norms, values, and behaviors necessary for participating within their society.

Evolutionary Theory

A set of principles that explains the diversity of life on Earth by processes such as natural selection, adaptation, and speciation.

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