State the relation between atomic number, mass number and number of neutrons in an atom.
Edit: Somethings got mixed up here. The answer to the "Bohr" question is "1913". That's when he came up with a model for the Hydrogen atom, at least.
Actually, I've seen various dates for this from 1912 and 1915, but I think
that 1913 is probably correct.
No one invented atoms, atoms were discovered. Niels Bohr did not discover or invent the atom, he did however create a model of the atom.
Some common nicknames for Niels Bohr are "The Father of Quantum Theory" and "The Architect of the Atom."
father atom
Niels Bohr's most famous discovery was the Bohr model of the atom in 1913, which proposed that electrons in an atom orbit the nucleus in fixed energy levels.
Bohr model, was Introduced by Niels Bohr in 1913
In Niels Bohr's model of the atom, how are electrons configured?
In Niels Bohr's model of the atom, how are electrons configured?
What was proven wrong about the structure of Niels Bohr atom
Niels Bohr's first experiment about the atom and quantum theory took place around 1920. He won a Nobel Prize in Physics in 1922.
Niels Bohr's major contribution to atomic theory was his development of the Bohr model, which described the structure of the atom with electrons orbiting the nucleus in discrete energy levels. This model helped explain the stability of atoms and the spectral lines observed in their emission or absorption of light. Bohr's work laid the foundation for modern quantum theory and the understanding of atomic structure.
Niels Bohr proposed the planetary model of atom.
Niels Bohr worked in the field of physics, with a focus on atomic structure and quantum theory. He made significant contributions to the development of the theory of quantum mechanics and is best known for his model of the atom, called the Bohr model.