25- The quantum number n is most closely associated with what property of the electron in a hydrogen atom? A. Energy B. Orbital angular momentum C. Spin angular momentum D. Magnetic moment E. z component of angular momentum
Quantum mechanics and hydrogen atom
Consider an electron of mass m moves with the velocity v in a hydrogen atom. If an electron is at a distance r from the proton, then the potential energy function of the electron can be written as follows:
Isotopes of Hydrogen Atoms
To understand isotopes, it's easiest to learn the simplest system. Hydrogen, the most basic nucleus, has received a great deal of attention. Several of the results seen in more complex nuclei can be seen in hydrogen isotopes. An isotope is a nucleus of the same atomic number (Z) but a different atomic mass number (A). The number of neutrons present in the nucleus varies with respect to the isotope.
Mass of Hydrogen Atom
Hydrogen is one of the most fundamental elements on Earth which is colorless, odorless, and a flammable chemical substance. The representation of hydrogen in the periodic table is H. It is mostly found as a diatomic molecule as water H2O on earth. It is also known to be the lightest element and takes its place on Earth up to 0.14 %. There are three isotopes of hydrogen- protium, deuterium, and tritium. There is a huge abundance of Hydrogen molecules on the earth's surface. The hydrogen isotope tritium has its half-life equal to 12.32 years, through beta decay. In physics, the study of Hydrogen is fundamental.
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Q 2Med Physics.pdf
D. Schr odinger's
E. Bohr's
25- The quantum number n is most closely associated with what property of the electron in a
hydrogen atom?
A. Energy
B. Orbital angular momentum
C. Spin angular momentum
D. Magnetic moment
E. z component of angular momentum
6.
26-The amount of work required to stop a moving object is equal to:
A. the velocity of the object
B. the kinetic energy of the object
C. the mass of the object times its acceleration
D. the mass of the object times its velocity
E. the square of the velocity of the object
27- The mass of a hydrogen atom, in kilograms, is approximately:
А. 10-27
В. 10-31
C. 10-24
D. 10-13
E. 10-8
28- The isotopes of an element:
A. cannot be separated at all
B. occur well separated in nature
C. have similar chemical behavior
D. cannot be separated by physical methods
E. have equal masses
29-Which of the following groups does NOT contain a scalar quantity?
A. velocity, force, power
B. displacement, acceleration, force
C. acceleration, speed, work
D. energy, work, distance
E. pressure, weight, time
30- According to the theory of relativity:
A. moving clocks run fast
B. energy is not conserved in high speed collisions
C. the speed of light must be measured relative to the ether
D. momentum is not conserved in high speed collisions
E. none of the above are true
Good luck, Dr. Jamal A. Hasan
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