Which of these refers to atoms with the same atomic number but different atomic masses?

Question

These atoms are isomers.
These atoms have different numbers of electrons.
These atoms are isotopes.
These atoms are different elements.
These atoms have different numbers of protons.
Request Answer
Part C
Fluorine's atomic number is 9 and its atomic mass is 19. How many neutrons does fluorine have?

19
81
9
10
28

Answer 1

The correct answer to the first question is:

These atoms are isotopes.

Isotopes are defined as atoms that have the same atomic number (number of protons) but different atomic masses (due to having different numbers of neutrons).

---

For part C, the atomic mass of fluorine is given as 19, and its atomic number is 9 (which indicates that it has 9 protons). To find the number of neutrons in an atom, you can use the following formula:

\[ \text{Number of neutrons} = \text{Atomic mass} - \text{Atomic number} \]

So for fluorine:

\[ \text{Number of neutrons} = 19 - 9 = 10 \]

The answer is:

10.