he relative atomic mass (A_r) of atoms is the average mass of all the different isotopes of an element (taking into account the amount of each isotopes) on a scale weere ^12C atoms have mass of exactly 12.

Question

Element Fluorine isotopes 19 9 F Abundance 100.0% Relative atomic mass (A_r) to (3sf) ___

Answer 1

For the element fluorine, there is only one stable isotope, \(^{19}_{9}\text{F}\), which has an abundance of 100%.

The relative atomic mass (A_r) of fluorine in this case is simply the mass of the isotope, which is approximately 19. The relative atomic mass to three significant figures is:

\[ \text{A_r (Fluorine)} = 19.0 \]

So the answer is:

Relative atomic mass (A_r) to (3sf) = 19.0