Question

Oxygen gas is always written as $O_2$ in chemical equations. What term is used to describe the “2” in the formula? $

Answer 1

Hint : $O_2$ is the chemical formula for oxygen, which is also known as dioxygen. Because oxygen usually combines with another oxygen by forming a covalent bond, this formula is given. Because it is diatomic, it requires two electrons to complete its octet, which it can easily obtain from another oxygen. Meanwhile, because oxygen is electronegative, it is extremely reactive. To gain stability, the reaction between the two oxygen atoms occurs quickly.

Complete Step By Step Answer:
A molecule of oxygen gas has the following formula $O_2$ . It is a diatomic element, which means it is made up of two covalently bonded oxygen atoms. The subscript “2” denotes that one molecule of oxygen contains two oxygen atoms.
On the periodic table, oxygen belongs to the chalcogen group. It is a necessary component in the majority of combustion processes.
It's one of the most common elements on the planet's surface.
Oxygen's Applications
-It's used in the production of glass and stone products, as well as in mining.
-In cases of high pressure, special oxygen chambers are used to increase the partial pressure of oxygen around the patient.
-Melting, refining, and manufacturing steel and other metals are among the most common uses of oxygen.

Note :
Thermodynamically, oxygen gas or free oxygen found on Earth is unstable. It is a highly reactive element in its pure form. By reacting with other elements, oxygen can easily form new compounds. With other elements, it usually forms oxides. To summarise, oxygen has a high degree of reactivity.