what is isobars , isotopes , valence electrons , valency , where is nucles present in atom , define atomic no. , define mass no. ,give three examples of isotopes used in daily life.....?
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what is isobars , isotopes , valence electrons , valency , where is nucles present in atom , define atomic no. , define mass no. ,give three examples of isotopes used in daily life.....?
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Answer:
isotopes are atoms of the same element, which have different mass number.
isobar are atoms having the same mass number but different atomic number.
Explanation:
valency of electrons is 2,8,8 .
the mass number of an atom is the number of nucleus in its nucleus.
the atomic number of an element is the same as the number of protons on the nucleus of an atom.