Question Text
Question 1 :
Helium atom has an atomic mass of 4 u and two protons in its nucleus. How many neutrons does it have?
Question 2 :
The mass of an electron is about $\frac{1}{2000}$ times that of proton.
Question 3 :
If atomic number is 16, mass number is 32 and name of atomic species is Sulphur then find number of neutrons.
Question 6 :
Fast moving alpha (α)-particles were made to fall on a thin gold foil. This experiment was performed by?
Question 7 :
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 8 :
An atom is divisible and consists of charged particles. TRUE OR FALSE?
Question 10 :
If Bromine atom is available in the form of, say, two isotopes $^{79}_{35}Br$ (49.7%) and $^{81}_{35}Br$ (50.3%), calculate the average atomic mass of bromine atom.