Question

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Answer 1

Answer:

1) 50 protons

2) 50 electrons

3) 69 neutrons

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Answer 2

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$\boxed{\fcolorbox{red}{pink}{Answer 1.}}$79

Atomic mass: 196.96657 u

Symbol: Au

$\boxed{\fcolorbox{red}{pink}{Answer 2.}}$2, 8, 18, 18, 4

Atomic number: 50

Atomic mass: 118.71 u

Symbol: Sn

$\boxed{\fcolorbox{red}{beige}{Answer 3.}}$69 neutrons

This tin atom has 50 protons, 69 neutrons and 48 electrons. This is one of six stable isotopes of tin. This isotope can also be written tin-119.

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