Answer:
the property of absorbing light of short wavelength and emitting light of longer wavelength.
Explanation:
YW
Answer:
Magnesium atomic no. = 24,25,26. These are the two elements which have same atomic no
Explanation:
The atomic number tells you the number of protons in an atom. This value never changes because the number of protons in the nucleus always remains constant. The mass number tells you the number of protons and neutrons (or nucleons) together: protons + neutrons = mass number. Since the number of neutrons in the nucleus varies, you can have different amounts of neutrons in the same type of atom. These varied types are called isotopes.
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