Answer:
Tornado warnings indicate imminent danger to life and property.
Explanation:
A tornado has been in sight or will come.
Explanation:
![E_n=-13.6\times \frac{Z^2}{n^2}eV](https://tex.z-dn.net/?f=E_n%3D-13.6%5Ctimes%20%5Cfrac%7BZ%5E2%7D%7Bn%5E2%7DeV)
Formula used for the radius of the
orbit will be,
(in pm)
where,
= energy of
orbit
= radius of
orbit
n = number of orbit
Z = atomic number
a) The Bohr radius of an electron in the n = 3 orbit of a hydrogen atom.
Z = 1
![r_3=476.1 pm](https://tex.z-dn.net/?f=r_3%3D476.1%20pm)
476.1 pm is the Bohr radius of an electron in the n = 3 orbit of a hydrogen atom.
b) The energy (in J) of the atom in part (a)
![E_n=-13.6\times \frac{Z^2}{n^2}eV](https://tex.z-dn.net/?f=E_n%3D-13.6%5Ctimes%20%5Cfrac%7BZ%5E2%7D%7Bn%5E2%7DeV)
![E_3=-13.6\times \frac{1^2}{3^2}eV=1.51 eV](https://tex.z-dn.net/?f=E_3%3D-13.6%5Ctimes%20%5Cfrac%7B1%5E2%7D%7B3%5E2%7DeV%3D1.51%20eV)
![1 eV=1.60218\times 10^{-19} Joules](https://tex.z-dn.net/?f=1%20eV%3D1.60218%5Ctimes%2010%5E%7B-19%7D%20Joules)
![1.51 eV=1.51\times 1.60218\times 10^{-19} Joules=2.4210\times 10^{-19} Joules](https://tex.z-dn.net/?f=1.51%20eV%3D1.51%5Ctimes%201.60218%5Ctimes%2010%5E%7B-19%7D%20Joules%3D2.4210%5Ctimes%2010%5E%7B-19%7D%20Joules)
is the energy of n = 3 orbit of a hydrogen atom.
c) The energy of an Li²⁺ ion when its electron is in the n = 3 orbit.
![E_n=-13.6\times \frac{Z^2}{n^2}eV](https://tex.z-dn.net/?f=E_n%3D-13.6%5Ctimes%20%5Cfrac%7BZ%5E2%7D%7Bn%5E2%7DeV)
n = 3, Z = 3
![E_3=-13.6\times \frac{3^2}{3^2}eV = -13.6 eV](https://tex.z-dn.net/?f=E_3%3D-13.6%5Ctimes%20%5Cfrac%7B3%5E2%7D%7B3%5E2%7DeV%20%3D%20-13.6%20eV)
![=-13.6eV = -13.6\times 1.60218\times 10^{-19} Joules=2.179\times 10^{-18} Joules](https://tex.z-dn.net/?f=%3D-13.6eV%20%3D%20-13.6%5Ctimes%201.60218%5Ctimes%2010%5E%7B-19%7D%20Joules%3D2.179%5Ctimes%2010%5E%7B-18%7D%20Joules)
is the energy of an Li²⁺ ion when its electron is in the n = 3 orbit.
d) The difference in answers is due to change value of Z in the formula which is am atomic number of the element..
![E_n=-13.6\times \frac{Z^2}{n^2}eV](https://tex.z-dn.net/?f=E_n%3D-13.6%5Ctimes%20%5Cfrac%7BZ%5E2%7D%7Bn%5E2%7DeV)
A table would show the exact values at certain times, while some kinds of graphs only show approximate values but for the “slight changes” it is best to have the exact numbers.
Answer:kapil
Explanation:
Atoms lose electrons, if an electron gets more energy than then binding energy of the electron. This may be because of a collision with a charged particle or because of absorbtion of a photon. In a metal, there are just other positive charges nearby. The electron is not lost, but shared.