The atomic mass of fluorine (F) is 19.00. Which of the following is not true? A) An atom of F has a mass of 19.00 amu. B) One mole of F has a mass of 19.00 g. C) The mass of 6.02 x 1023 atoms of F is 19.00 g. D) The mass of 6.02 x 10 ²³ atoms of F is 19.00 amu. E) The approximate total number of protons and neutrons in fluorine is 19.

Question

Quizplus · Accepted Answer

Option A is true because the atomic mass of fluorine is the mass of one atom of fluorine, which is 19.00 amu.
Option B is true because one mole of any element contains Avogadro's number of atoms or molecules, which in the case of fluorine would have a mass of 19.00 g.
Option C is true because 6.02 x 1023 atoms of fluorine, which is one mole of fluorine, would have a mass of 19.00 g.
Option E is true because the atomic mass of fluorine is the sum of the number of protons and neutrons in the nucleus of the fluorine atom, which is approximately 19.
However, option D is false because the mass of 6.02 x 1023 atoms of fluorine is 19.00 g, not 19.00 amu. The atomic mass unit (amu) is a unit of mass used for individual atoms, while grams are a unit of mass used for larger quantities of atoms or molecules.

The Atomic Mass of Fluorine (F) Is 19