Question Text
Question 1 :
Chlorine occurs in nature in two isotopic forms, with masses 35 u and 37 u in the ratio of 3:1. Calculate the average atomic mass.
Question 3 :
Helium atom has an atomic mass of 4 u and two protons in its nucleus. How many neutrons does it have?
Question 4 :
If atomic number is 16, mass number is 32 and name of atomic species is Sulphur then find number of electrons.
Question 5 :
The chemical properties of isotopes are similar but their physical properties are different. TRUE OR FALSE?
Question 7 :
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With the help of the above table, find out the mass number of oxygen and sulphur atom.
Question 8 :
Fast moving alpha (α)-particles were made to fall on a thin gold foil. This experiment was performed by?
Question 9 :
The number of electrons gained, lost or shared so as to make the octet of electrons in the outermost shell is called?
Question 10 :
J.J. Thomson proposed that the nucleus of an atom contains only nucleons. TRUE OR FALSE?