Find Tuition/Enrichment Centres

AskQ logo

STUCK ON HOMEWORK?

ASK FOR HELP FROM OUR KIASUPARENTS.COM COMMUNITY!

Question

An early model of the atom, as shown below, was proposed by J.J. Thomson in 1904. He described the structure of the atom as a positively charged sphere with small, negatively charged electrons embedded inside.  These electrons are free to circulate in rings within the sphere.

[see uploaded image]

Which of the following provide a correct comparison of Thomson’s model with the currently accepted model of the atom?

  1. Both correctly describe the atom as consisting of electrons and protons.
  2. Both correctly describe the electrons as freely circulating inside the atom.
  3.   The currently accepted model describes the positive charges as being concentrated in a tiny core of the atom.
  4. The currently accepted model describes the presence of the neutral particles which contribute partially to the mass of the atom.

 

A. III and IV only

B. I, II and III only

C. II, III and IV only                     

D. I, II, III and IV                                            

Source: assignment

Answer

the answer to this is A.  The current simplified atomic model describes the presence of positively charged protons and neutral neutrons concentrated in the nucleus of the atom and which make up most of the mass of the atom.  The electrons are only free to move within specified shells (energy levels) of the atom.

 

0 Replies 1 Like ✔Accepted Answer
Find Tuition/Enrichment Centres