Question

05) Teacher wrote the electronic configuration of an atom of an element as 2, 8, 7. What is the atomic number of?ਅਧਿਆਪਕ ਨੇ ਕਿਸੇ ਤੱਤ ਦੋ ਪਰਮਾਣੂ ਦੀ ਇਲੈਕਟ੍ਰਾਨੀ ਤਰਤੀਬ 2, 8, 7 ਲਿਖੀ। ਇਸ ਤੱਤ ਦਾ ਪਰਮਾਣੂ नववी??(B)2(C) 17(D)06) Sanjeev asked his teacher that which law is obeved from these options to balance a chemical equation?​

Answer 1

Answer:

mass can neither be created nor be destroy ed

Answer 2

Answer:

the answer is chlorine

Explanation:

because the electronic configuration 2,8,7 . if we add the three numbers we get 17 and the atomic no of chlorine is 17 hence proved

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