MCQ
Which scientist proposed the concept of atomic mass?
  • A
    Avogadro
  • B
    Gay Lussac
  • Proust
  • D
    Dalton

Answer

Correct option: C.
Proust

The concept of atomic mass was proposed by William Prout. Early atomic mass theory was proposed by the English chemist William Prout in a series of published papers in $1815$ and $1816$. Known as Prout's Law, Prout suggested that the known elements had atomic weights that were whole number multiples of the atomic mass of hydrogen.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

A point object is placed at a distance of 30 cm from a convex mirror of focal length 30cm. The image will form at
Which is not an electrostatic phenomenon:
Two light rays initially in same phase travel through two media of equal length $L$ having refractive index $m _1$ and $m_2\left(m_1 > m_2\right)$ as shown in figure. If the wave length of light rays in air is $1$ , the phase difference of the emerging rays is given by
At a certain distance from a point charge the electric field is $500\,V/m$ and the potential is $3000\,V$. What is this distance......$m$
For the forward biased diode characteristics shown in the figure, the dynamic resistance at ${I}_{{D}}=3 \,{mA}$ will be $.....\,\Omega$
Two parallel slits $0.6 \,mm$ apart are illuminated by light source of wavelength $6000 Å$. The distance between two consecutive dark fringes on a screen $1 \,m$ away from the slits is
In the figure a capacitor is filled with dielectrics. The resultant capacitance is
Two insulated charged spheres of radii $20\,cm$ and $25\,cm$ respectively and having an equal charge $Q$ are connected by a copper wire, then they are separated
The radius of the convex surface of plano-convex lens is 20 cm and the refractive index of the material of the lens is 1.5. The focal length of the lens is
 
When a certain photosensitive surface is illuminated with monochromatic light of frequency $v$ , the stopping potential for the photo current is $-V_0/2.$ When the surface is illuminated by monochromatic light of frequency $v/2,$ the stopping potential is $-V_0.$ The threshold frequency for photoelectric emission is