which part of a atom is involved in forming chemical bonds?

The valence electrons; i.e., those in the outside shell(s).

all the parts are involved but certain parts make it more wataganlistic

The part of an atom involved in forming chemical bonds is the outermost shell, also known as the valence shell. The valence shell contains the valence electrons, which are the electrons responsible for the atom's chemical properties and its ability to bond with other atoms.

To determine the number of valence electrons in an atom, you can use the periodic table. Each element is arranged in periods and groups. The group number (also known as the column) of an element indicates the number of valence electrons it has. For example, elements in Group 1 (such as hydrogen and lithium) have 1 valence electron, while elements in Group 17 (such as fluorine and chlorine) have 7 valence electrons.

Chemical bonding occurs when atoms share, gain, or lose electrons to achieve a stable electron configuration. Atoms with incomplete valence shells tend to bond with other atoms in order to achieve a full valence shell. This can be accomplished through different types of chemical bonds, such as ionic bonds (where electrons are transferred between atoms) or covalent bonds (where electrons are shared between atoms).

It is important to note that the number of valence electrons and the electron configuration of an atom determine its chemical behavior and the type of bonds it can form.