0
What else can I help you with?
Who proposed that this is where electrons moved around the nucleus?
John Dalton
What scientist discovered that electrons moved in shells?
Niels Bohr proposed the theory that electrons move in specific energy levels or shells around the nucleus of an atom. This model, known as the Bohr model, was based on his work with the hydrogen atom and was published in 1913.
What moved in fixed orbits around the nucleus in Bohr's model of a the atom?
Electrons moved in fixed orbits around the nucleus in Bohr's model of the atom. These orbits were quantized, meaning they had specific energy levels, and electrons could jump between these orbits by either absorbing or emitting energy.
What did Ernest Ruther think the atom looked like?
Ernest Rutherford proposed that the atom resembled a small, dense nucleus surrounded by orbiting electrons. This model, known as the Rutherford model, described the atom as mostly empty space with electrons orbiting the nucleus similar to planets orbiting the sun.
Ernest Rutherford's contribution to the atomic structure due to the gold foil experiment?
Ernest did an experiment where he shot alpha particles into a gold foil that proved the concept of a nuclear atom, that is an atom with a nucleus made of protons and neutrons and have electrons moving around the nucleus in some way. His experiment did not show the position of electrons or energy levels or even how they moved.
What was Ernest Rutherford contribution to the atom?
Ernest did an experiment where he shot alpha particles into a gold foil that proved the concept of a nuclear atom,that is an atom with a nucleus made of protons and neutrons and have electrons moving around the nucleus in some way.His experiment did not show the position of electrons or energy levels or even how they moved.
What is the contribution of a foriegn scientist?
Ernest Rutherford was the first person to transmute an element. He also produced the model of an atom in which a tiny nucleus was surrounded by a vast space in which the electrons moved.
What is the difference between the plum pudding and the nuclear model of an atom?
- Plum pudding model: electrons are included in a positive sphere.- The Bohr model consider that electrons are in a continuous movement around the atomic nucleus.
Who was the first to notice that when electrons flow through a wire a nearby compass needle moved?
Oersted first noticed this around 1820.
Are valence electrons held loosely by the atom?
Assuming you are talking about the electrons in their shells (not the displaced ones):It depends on the distance of those electrons from the nucleus. For example electron in the outer shell of potassium (K) is further away form the nucleus than electron in the outer shell of sodium (Na).It means that potassium can lose this electron in outer shell easier than sodium does, and therefore is more reactive than sodium.
what is polar covalent compounds?
A polar covalent compound is a compound consisting of molecules which have regions of positive and negative charge due to the covalent bonding between atoms. The atom with a greater charged nucleus ( atoms with greater proton number) will attract the shared electrons causing them to move closer to the nucleus which will make this slightly negatively charged due to the negative electrons. The atom which the shared electrons has moved away from ( atoms with smaller proton number) will become slightly positively charged.
What shortcomings in the atomic model of ernest Rutherford led to the development of niel's bohr's model?
One problem with Rutherford's model was that if electrons moved in such random orbits, they would emit electromagnetic waves, according to the laws of classical mechanics. No radiation was seen, and the release of radiation from the electrons would cause them to decay and lose energy. This would cause the electrons to spiral down to the nucleus, and destroy itself. This model said that all matter was unstable. Like Thompson's, Rutherford's model was still not able to explain atomic emission and absorption in the line spectra. He could not answer to why atoms produce light at specific, discreet wavelengths. He also could not explain why atoms emitted and absorbed at discreet wavelengths as opposed to bands of continuous wavelengths. Rutherford's discovery of the nucleus of the atom and his theory that electrons orbit around the positively charged nucleus led to Neils Bohr's idea that the electrons actually travelled in fixed energy levels, which did not cause electrons to lose energy while orbiting and also explained the light emissions of the atoms.
