Moseley's Law

Q.

Name the characteristics of group four elements.

Q.

According to Moseley, a straight line graph is obtained on plotting

1. The frequencies of characteristic X-rays of the elements against their atomic numbers.

2. The square of the frequencies of the characteristic X-rays of elements against their atomic numbers

3. The square root of the frequencies of the characteristic X-rays of elements against their atomic numbers.

4. The reciprocal of the frequencies or characteristic X-rays of elements against their atomic numbers.

Q.

Which of the following radial distribution graphs corresponds to l = 2 for H atom for the least value of n for which l = 2 is allowed?

1. 
   
2. 
3. 
4. 
5. 

Q. What is the proper definition of mole?

Q.

Give a one-word answer.

Name the scientist who gave modern periodic law.

Q. 8. What is the maximum wavelength line in Lyman series of He+ atom? a 3R b. 1/3R c. 4/4R. d. None

Q. 10. what is meant by Maxwellian distribution of energy in case of thermal neutrons?

Q.

What is the wavelength of light emitted when the electron in a hydrogen atom undergoes transition from an energy level with n = 4 to an energy level with n = 2?

Q. In 1913, Moseley, a young physicist, discovered the relationship between the X-ray spectra frequency and the atomic number of elements. If we draw a curve between the X-ray frequency $\left(\sqrt{\nu }\right)$ and the atomic number $\left(Z\right)$, it will be a:

1. Parabola
2. Hyperbola
3. Straight line
4. Rectangular Hyperbola

Q. 28.Calculate frequency of x-rays when atomic number is 50 and a=b=1

Q. In 1913, Moseley discovered the relationship between the X-ray spectra frequency and the atomic number of elements. If we draw a curve between the X-ray frequency $\left(\sqrt{\nu }\right)$ and the atomic number $\left(Z\right)$, it will be a:

1. Parabola
2. Hyperbola
3. Straight line
4. Rectangular Hyperbola

Q. "The 6 properties of the elements are a periodic function of their atomic numbers.” The statement was given by?

1. N. Bohr
2. J.W. Dobereiner
3. D.I. Mendeleev
4. H.G.J. Moseley

Q.

Which of these following will be in increasing order in the modern periodic table?

1. Atomic number

2. Atomic mass

3. No of neutrons

4. All of these