Most neutral atoms of fluorine have an atomic mass of 19 amu and an atomic number of 9. What are these atoms composed of?
O A. protons, 19 neutrons, and 9 electrons
• B. 9 protons, 10 neutrons, and 10 electrons
• c. 9 protons, 10 neutrons, and 9 electrons
O D. 9 protons, 9 neutrons, and 9 electrons

the electron configuration that you gave me has 16 electrons ergo it has 16 protons ergo it is the element sulfur.

the correct answer to this question is 2

percent abundance for cu-63 can be shown as:

63 x + 65 (1-x) = 62.9296

65 - 62.9296 = 2 x

x = 1.035

thus, percent abundance for cu-63 is 1.035

percent abundance for cu-65 can be shown as:

63 x + 65 (1-x) = 64.9278

65 - 64.9278 = 2 x

x = 0.0361

thus, percent abundance for cu-63 is 0.0361

the mass spectrum of cu-63 showing the intense peak as, this isotope is found in nature more abundantly around 92.38 % in comparison to cu-65 which is found 62.58 % naturally