Identify by Number (1A-8A) the Main Group of the Periodic

question 4

Essay

Identify by number (1A-8A) the main group of the periodic table to which the described element (X) belongs, in each of the following cases.
a. X commonly forms the ion X^2-.
b. X reacts with water according to the equation
X(s) + 2H₂O(l) → X(OH)₂(aq) + H₂(g)
c. X exists as molecules, X₂; its hydride has the formula HX.
d. X is a metal which reacts with oxygen to produce the peroxide, X₂O₂.

---

Definitions:

Virtuous Qualities

pertains to moral excellence and righteousness, often considered desirable traits in individuals.

Positive Institutions

Organizations or structures in society that promote individual well-being, positive psychology, and the development of strengths and virtues.

Positive Affect

A dimension of emotional experience that reflects the extent to which an individual feels enthusiastic, active, and alert.

Positive Institutions

Refers to organizations or frameworks that contribute to the well-being and positive functioning of individuals and communities.