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

question 26

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.

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Definitions:

Utilitarianism

A moral philosophy that bases the rightness or wrongness of actions on their consequences, especially their ability to bring about the greatest happiness for the greatest number of people.

Intentions

The plans or desires that one has in mind to carry out an action.

Consequentialists

Ethical theorists who believe that the morality of an action is determined solely by its consequences.

Pleasure

A sense of satisfaction or happiness experienced through enjoyable activities or sensations, often regarded as a key component of human well-being.