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1) How many electrons are there in each shell of an atom of lead?2) What are isotopes? whoever answers this question will get 15 ptsPLS ANSWER

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Answer:

  1. Each SHELL consists of one or more subshells, and each SUBSHELL consists of one or more atomic orbitals.
  2. Isotopes are variants of a particular chemical ELEMENT which differ in neutron NUMBER, and consequently in nucleon number. All isotopes of a given element have the same number of protons but DIFFERENT numbers of neutrons in each atoms.
  3. Explanation:

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