Complete the chart for each element. Report the atomic weight to 3 decimal places

element Atomic atomic atomic number of number number of name symbol number mass protons of neutrons electrons 1. He 2.krypton 3. 82 4. 31 5. 35 6. 28 7. Gd 8.Palladium 9. 50.942 10.Beryllium 11. 22 12. 50 13. Ag ... click for more

Inequality

Show that X^4 - x^3 + 1 > 0

Bohr orbit without electric charge

Derive the expression for Bohr radius and E if the electric charge did not exist and the electrons were bound to protons by gravitational force.

Bohr radii and energy levels.

An electron of mass m is in a circular orbit in the potential U=0.5 k r^2. Using Bohr's quantization rule, find the allowed orbital radii and energy levels of this electron.

Magnitude and Direction

What are the magnitude and direction of the electric field that balances the weight of an (a) electron and (b) a proton?