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In cesium atoms (Z = 55), the 55th electron has principle quantum number n=6 and is outside closed shells, which partially shield the nuclear charge.
(a) First, suppose the shielding effect of the 54 inner electrons is perfect, and use the Bohr Theory to determine the ionization energy (in eV).
(b) If an "effective nuclear charge", Zeffe, experience by the outermost electron is to give agreement between Bohr theory and the measured Cs ionization energy of 3.98eV, what is Zeff?
(c) Use Bohr Theory, with this effective nuclear charge, to determine the average orbital radius of the outer electron.
An ancient wooden club is found that contains 195 g of carbon and has an activity of 7.0 decays per second. Decide its age assuming that in living trees the ratio of 14C/12C atoms is about 1.3 multiplied by 10-12.
An ideal gas has a pressure of 2.5 atm, a volume of 1.0L at at temperature of 30 degrees Celcius. How many molecules are there in the gas
An object is placed 24.0 cm to the left of a diverging lens(f = -5.89 cm). A concave mirror (f = 16.8 cm) isplaced 36.7 cm to the right of the lens to form an image of thefirst image formed by the lens. Find the final image distance,measured relative..
A 170 g block connected to a light spring with a force constant of k = 4N/m oscillates on a horizontal, frictionless surface. What is the maximum magnitude of the force exerted by the spring during this motion
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What is the tangential acceleration of a bug on the rim of a6.0 in. diameter disk if the disk moves from rest to an angular speed of 77 rev/min in 4.0s? When the disk is at its final speed, what is the tangential velocity of the bug?
consider a rocket launched from vandenberg afb ca longitude34.6 degrees having an initial velocity of 3 kms in the
A potential difference of 87mV exists between the inner and outer surfaces of the cell membrane. The inner surface is negative relative to outer surface. How much work is required to eject a positive sodium ion (Na+) from the interior of the cell.
suppose a stereo home-audio system draws at most an electrical power of 100 w from the outlet uses a power of 2 w for
A block of unknown mass, m, is brought into the configuration shown. It was measured that upon release the block shot upward a maximum distance of 2m. Calculate the mass of this block? The upper spring has a natural length of 1m, and the lower spr..
A pump lifts 200 kilogram of water per hour a height of 5.0 meter. Find the minimum necessary power output rating of the water pump
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