Question

Atom A has a mass number 209 and atomic number 82.How

many protons and neutrons are present in an atom A?​

Answer 1

Answer:

no. of protons=atomic no.=82

no. of neutrons=mass no. - atomic no.=209-82=127

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Answer 2

$\huge\mathcal{\red {\underline {\overline {\mid {\pink {Answer}}\mid}}}}$

Number of protons = 82

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀(as atomic number is 82)

no. of neutrons = mass no. - atomic no.

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀= 209 - 82

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀=127