Homework Answers
Force exerted on nucleus by electron is equal to force exerted on electron by nucleus because force is between nucleus and electron and directly proportional to both charges nucleus and electron.
Coulomb force between neutron and electron is zero because charge of neutron is zero.
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In a simple model of the helium atom, two electrons orbit a nucleus consisting of two...
A helium atom contains two protons, two neutrons, and two electrons, and it is electrically neutral....
A helium atom contains two protons, two neutrons, and two electrons, and it is electrically neutral. Each proton contains two up quarks and one down quark, and each neutron contains two down quarks and one up quark. Electrons have a charge of -e, up quarks have a charge of +2e/3, and down quarks have a charge of -1e/3. (a) How much positive charge is contained in the nucleus? с (b) How much negative charge is contained in the nucleus (absolute...
2 Atomic Physics The Rutherford model of an atom asserts that electrons move in circular or...
2 Atomic Physics The Rutherford model of an atom asserts that electrons move in circular or elliptical orbits about the nucleus They are held in orbit by the Coulomb force. In hydrogen a single electron moves in a circular orbit around a single proton. The radius of a hydrogen atom is 5.3. 10-1 m a) What is the Coulomb force between the proton and the electron? (b) What is the speed of the electron?
5. Sketch the planetary picture of the Helium Atom (Z=2, A=4). The radius of the electrons...
5. Sketch the planetary picture of the Helium Atom (Z=2, A=4). The radius of the electrons orbits in Helium (i.e. the size of the Helium Atom) is about Re = 2 x 10^-11m while the distance between the two protons is the nucleus is about Rff =2x10^-15m. Write down the ratio of the repulsive electric force between the two protons to the attractive electric force between the Helium nucleus and the electron R2 = RFF/F nucl. Judiciously do any possible...
3. Estimate the distance between the electron of a Helium atom to the nucleus if 28...
3. Estimate the distance between the electron of a Helium atom to the nucleus if 28 MeV is needed to remove it from the atom. [Given that there are 2protons, 2 neutrons and 2 electrons in an Helium atom)
the nucleus of lithium contains three protons and three neutrons. when two electrons are removed from...
the nucleus of lithium contains three protons and three neutrons. when two electrons are removed from the neutral lithium atom, the remaining electron has an average distance from the nucleus of 0.018nm. what is the force between the electron and the nucleus at this separation?
Problem 2: Helium Spectra In helium, there are two electrons, which makes the math in finding...
Problem 2: Helium Spectra In helium, there are two electrons, which makes the math in finding their energy levels much more complicated. As a first approximation to that math, we can use Bohr energy levels with Z = 1.34 for the neutral helium atom (ie when both electrons are present), and Z = 2 for the singly ionized helium atom (ie when only one electron is present). The lower Z value for the neutral helium atom can be thought of...
Suppose a single electron orbits about a nucleus containing two protons (+2e), as would be the...
Suppose a single electron orbits about a nucleus containing two protons (+2e), as would be the case for a helium atom from which one of the naturally occurring electrons is removed. The radius of the orbit is 4.22 × 10-11 m. Determine the magnitude of the electron's centripetal acceleration.
15. The planetary model of the atom pictures electrons orbiting the atomic nucleus much as planets...
15. The planetary model of the atom pictures electrons orbiting the atomic nucleus much as planets orbit the Sun. In this model you can view hydrogen, the simplest atom, as having a single electron in a circular orbit 1.06xl diameter. (a) If the average speed of the electron in this orbit is known to be 2.20x10° m/s, calculate the number of revolutions per second it makes about the nucleus. (b) What is the electron's average velocity? 0-10 m in
A helium nucleus has 2 Protons and 2 Neutrons. If the distance between the protons in...
A helium nucleus has 2 Protons and 2 Neutrons. If the distance between the protons in the nucleus is 10-15 m. What is the magnitude of the Electrostatic Force?
In the Bohr model of the atom, electrons travel in circular orbits around a nucleus in...
In the Bohr model of the atom, electrons travel in circular orbits around a nucleus in much the same way that planets orbit the sun. Within this model, and electron in a hydrogen atom orbits the proton in a circle with radius 5.29×10−11m. What is the electric potential energy of the hydrogen atom?
A helium atom contains two protons, two neutrons, and two electrons, and it is electrically neutral. Each proton contains two up quarks and one down quark, and each neutron contains two down quarks and one up quark. Electrons have a charge of -e, up quarks have a charge of +2e/3, and down quarks have a charge of -1e/3. (a) How much positive charge is contained in the nucleus? с (b) How much negative charge is contained in the nucleus (absolute...
2 Atomic Physics The Rutherford model of an atom asserts that electrons move in circular or elliptical orbits about the nucleus They are held in orbit by the Coulomb force. In hydrogen a single electron moves in a circular orbit around a single proton. The radius of a hydrogen atom is 5.3. 10-1 m a) What is the Coulomb force between the proton and the electron? (b) What is the speed of the electron?
5. Sketch the planetary picture of the Helium Atom (Z=2, A=4). The radius of the electrons orbits in Helium (i.e. the size of the Helium Atom) is about Re = 2 x 10^-11m while the distance between the two protons is the nucleus is about Rff =2x10^-15m. Write down the ratio of the repulsive electric force between the two protons to the attractive electric force between the Helium nucleus and the electron R2 = RFF/F nucl. Judiciously do any possible...
3. Estimate the distance between the electron of a Helium atom to the nucleus if 28 MeV is needed to remove it from the atom. [Given that there are 2protons, 2 neutrons and 2 electrons in an Helium atom)
Problem 2: Helium Spectra In helium, there are two electrons, which makes the math in finding their energy levels much more complicated. As a first approximation to that math, we can use Bohr energy levels with Z = 1.34 for the neutral helium atom (ie when both electrons are present), and Z = 2 for the singly ionized helium atom (ie when only one electron is present). The lower Z value for the neutral helium atom can be thought of...
15. The planetary model of the atom pictures electrons orbiting the atomic nucleus much as planets orbit the Sun. In this model you can view hydrogen, the simplest atom, as having a single electron in a circular orbit 1.06xl diameter. (a) If the average speed of the electron in this orbit is known to be 2.20x10° m/s, calculate the number of revolutions per second it makes about the nucleus. (b) What is the electron's average velocity? 0-10 m in
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