Question

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an isotope contains 9 protons and 10 neutrons. construct the
symbol for the isotope.

tap on the parts of the symbol to enter or change the contents.

Explanation:

Step1: Determine the element

The number of protons is the atomic number (Z). Since there are 9 protons, the atomic number Z = 9. The element with atomic number 9 is fluorine (F).

Step2: Calculate the mass number

The mass number (A) is the sum of protons and neutrons. So A = number of protons + number of neutrons = 9 + 10 = 19.

Step3: Construct the isotope symbol

The isotope symbol is written as $^A_Z\text{X}$, where X is the element symbol. Substituting the values, we get $^{19}_9\text{F}$.

Answer:

$\boldsymbol{^{19}_9\text{F}}$