Atom A has a mass number 209 and atomic number 82. Atom B has a mass number 209 and atomic number 83. 1. How many protons atom A has? 2. How many protons atom B has? 3. Are atoms A and B isotopes of the same element?

Atom A- ^ 209 A _ 82 Atom B- ^ 209 A _ 83 1. A has 82 protons as the atomic number is 82. 2. B has 83 protons as the atomic number is 83. 3. No, A and B are not isotopes of each other because their atomic numbers are not same.

Atom A has a mass number 209 and atomic number 82. Atom B has a m…

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Question

Atom $A$ has a mass number $209$ and atomic number $82$. Atom $B$ has a mass number $209$ and atomic number $83$.

How many protons atom $A$ has?
How many protons atom $B$ has?
Are atoms $A$ and $B$ isotopes of the same element?

✓

Answer

$\text{Atom A}-{^{209}\text{A}}_{82}$ $\text{Atom B}-{^{209}\text{A}}_{83}$

$A$ has $82$ protons as the atomic number is $82$.
$B$ has $83$ protons as the atomic number is $83$.
No, $A$ and B are not isotopes of each other because their atomic numbers are not same.

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