Because all atoms are made from the same particles which are protons, neutrons, and electrons.
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Answer:
Brackett Series (n = 4)
Explanation:
The least energetic line of Hydrogen atom lies in <em>Brackett Series </em>when n = 4 because these are least energetic, have longer wavelengths and lies in Infrared region of spectrum. No traces of <em>Pfund series </em>are formed by H=atoms.
Answer:
1. B
2. D. the form of a substance changes but not its identity
3. C
4. D