An atom is the smallest unit of ordinary matter that forms a chemical element. Every solid, liquid, gas, and plasma is composed of neutral or ionized atoms. Atoms are extremely small, typically around 100 picometers across. They are so small that accurately predicting their behaviour using classical physics—as if they were tennis balls.
An atom with 16 protons is the element sulfur (S).
By definition, ethers must contain at least one oxygen atom.
Yes, that is part of the definition of electron affinity.
Atoms by definition are neutral. Once they gain or lose electrons and acquire a charge, they are called ions.
valence electrons are the electrons in the outermost energy level
No, a drawing of an atom is not a scientific definition. A scientific definition of an atom would describe it as the smallest unit of matter that retains the properties of an element.
not exact but the mass of an atom
This is the definition of an "isotope".
By definition, it will always be an element, never a compound.
Atomicity is having atoms. Also the number of atoms in a molecule.
A single type of atom. Which is the definition of an element
Hydrogen-1. It is a single proton and a single electron.
if you are talking about 'copper'(which I think you are) than yes, it does. Every element contains only one type of atom in it, that's actually the definition of an atom.
An atom with 16 protons is the element sulfur (S).
By definition, an element is a single atom, not a molecule.
An ion or a radical.
a single occurrence of a process, e.g., the ionization of one atom.