Teaching BPSC बिहार माध्यमिक TGT (9 to 10) शिक्षक भर्ती 4.0 Mock Test General Science Chemistry Structure of Atom
One of the important postulations of Dalton's atomic theory is:
1
an atom is made up of electrons, protons and neutrons
2
atom can be neither created nor destroyed
3
atoms of the same element are not alike
4
More than one of the above
5
None of the above