How hydrogen atom is different from atoms of all other elements?Q.2 Find out the number of electrons present in last shell of an atom having atomic number 15?Q.3 What is the basic differences between proton and neutron?Q.4 During a chemical reaction, number of electrons changes but number of proton remains constant .Why?Q.5 What is relation between atomic number and mass number?
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answer 1 because of electropositive nature
answers 2 ectrons are 5
answers 3 proton is positively charge and neutron is negatively charge
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