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Who proposed that this is where electrons moved around the nucleus?
John Dalton
What did Ernest Ruther think the atom looked like?
Ernest Rutherford first suggested that an atom is made mostly of space. He also thought that electrons moved around the nucleus like the planets moved around the sun.
What moved in fixed orbits around the nucleus in Bohr's model of a the atom?
Bohr did not speak of fixed LOCATIONS of electrons, he spoke of fixed energy levels. His name for such energy levels was "orbits" or "orbitals."
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 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.
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.
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.
Why is the net electric charge in a curren carrying wire normally zero?
Electrons or other charged particles are moved around; no new charges are created.
What does an electron produce?
An electron produces an electron cloud when it is moved about a nucleus of an atom.
