Oxygen atoms normally have 8 protons, 8 neutrons, and 8 electrons. An isotope of oxygen with an atomic mass of 18 would have two extra
Charged particles
Neutrons
Protons
Electrons
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Ответ:
A radical is an atom, ion, or molecule that has unpaired electrons.
A compound is a combination of two or more elements.
Molecule: a group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.
An atom is the basic unit of an element. An atom is a form of matter which may not be further broken down using any chemical means.