electrons
In the normal sense of "react", no parts meet: The nuclei remain distinct but electons may be shared.
They have electrons that can interact with the electrons from other atoms to form bonds. Both atoms are stabilized by having their electron clouds interact, and so this is a favorable interaction. In chemical reactions, bonds are both made and broken. When bonds are formed, the electron clouds of two nearby atoms interact to form a bond that holds the atoms together.
Electrons are the particles in atoms that are involved in chemical reactions.
an atom that holds other atoms
This does occur. The bonds begin to form when electrons from two different atoms begin to interact with other atoms until the two atoms become joined together.
In the normal sense of "react", no parts meet: The nuclei remain distinct but electons may be shared.
Some or all of its valence electrons.
While a lone oxygen nucleus might exist under extreme conditions, if allowed to interact with other atoms at the temperatures at which chemical bonds can form, that oxygen nucleus would immediately take electrons from other atoms until it formed a neutral atom.
They have electrons that can interact with the electrons from other atoms to form bonds. Both atoms are stabilized by having their electron clouds interact, and so this is a favorable interaction. In chemical reactions, bonds are both made and broken. When bonds are formed, the electron clouds of two nearby atoms interact to form a bond that holds the atoms together.
Electrons are the particles in atoms that are involved in chemical reactions.
Bonding between atoms occurs at the valence electron level. Core electrons and the atomic nucleus are unaffected.
Electrons bond two or more atoms by being shared between atoms.
an atom that holds other atoms
This does occur. The bonds begin to form when electrons from two different atoms begin to interact with other atoms until the two atoms become joined together.
because the hydrogen atom smells and the other atoms make fun of it
Valence electrons, the are on the outermost layer of the atom
It doesn't necessarily "bonds to four other atoms."