Question

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Answer 1

Answer:

atomic number of chlorine is 17 and sulphur is 16 .

Isotopes have similar chemical properties because they behave like elements and have all chemical properties and different physical properties .

2 Isotopes of hydrogen are H2 and H 3

Explanation:

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Answer 2

Answer:

A black hole is a region of spacetime where gravity is so strong that nothing—no particles or even electromagnetic radiation such as light—can escape from it. The theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole.