In 1H2– no. of p = 1and no. of n = 2 – 1= 1
Which of the following pairs are isotopes?
The isotopes of an element have
Isotopes have same atomic number but different mass number e.g., 17Cl35 and 17Cl36
Which of the following statements is incorrect for cathoderays?
In an atom valence electron are present in
By whom was neutron discovered?
The nucleus of an atom contains
The nucleus contains protons and neutrons whereas electrons revolves around the nucleusin circular orbits.
The cathode ray experiment was done for the first time by
The correct symbol for silver is
The total number of atoms represented by the compound CuSO5.5H2O is
1 atom of Cu+1 atom of sulphur + 9 atoms of oxygen + 10 atoms of hydrogen. Total number of atoms in compound is 21.