Question

B. Statements given below are incorrect we
the correct statements.
1. M-shell of an atom can have maximum of
eight electrons
2. The atoms of different elements having
same mass number, but different atomic
number are called isotopes.
3. Deuterium an isotope of hydrogen has two
neutrons in its nucleus.
4. The electronic configuration of ik is 2.9.8.
5. Helium, a noble gas has eight electrons in
its valence shell.
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Answer 1

Answer:

I don't really know i am sorry