The short answer is, it depends. The ability of two isolated atoms to form a bond on their own is determined by a variety of factors, such as their chemical properties, the nature of their electron configurations, and the environmental conditions they are in.
The likelihood of two isolated atoms forming a bond on their own is generally very low. This is because most atoms are stable when they have a full outer electron shell, and forming a bond typically requires the sharing or transfer of electrons, which can be difficult for isolated atoms to do on their own.
In most cases, two isolated atoms cannot form a bond without some form of external influence or energy. This is because the formation of a bond usually requires a certain amount of energy to overcome the repulsive forces between the atoms and bring them close enough together to interact.
There are some exceptions to this rule, particularly in the case of atoms with very low electronegativity values. These atoms are more likely to form bonds with other atoms without the need for external influence or energy.
No, the formation of a bond between two isolated atoms is not a spontaneous process. It requires a certain amount of energy to overcome the repulsive forces between the atoms and bring them close enough together to interact. This energy can come from external influences, such as heat or light, or from the atoms themselves if they have low electronegativity values.