(a) Write the name of the sub – atomic particle discovered by J. Chadwick. What type of charge occurs on this particle? In which part of an atom this particle is located?; (b) List three steps of an experiment performed by Rutherford for his model of an atom.; (c) Define isobar, write its one example.; (d) Which scientist concluded that the size of the nucleus is very small as compared to the size of an atom?
Answers
Hi !
a) Neutron
b) He took a gold foil and alpha particles and Zinc Sulphide Screen
c) Isobars are different elements that have same number of neutrons
d)Rutherford
Hope this helps
Answer:
Explanation:
(a) the name of the sub atomic particle discovered by J. Chadwick is neutron.
it has no net electric charges. it can be located in the nucleus of a atom.
(b) 1-he directed a narrow beam of Alpha particles at an extremely thin gold foil in an evacuated chamber.
2- the presence of Alpha particles around the theme file was detected by using a circular fluorescent zinc sulphide screen.
3- the point at which an Alpha particle strike the screen flash of green light is produced
(c) isobars are atoms of different elements having same mass number but different atomic numbers for example 40S, 40Cl, 40Ar, 40K, and 40Ca
(d) Rutherford