What are the atomic number and atomic mass number of fluorine atoms with 9 protons and 10 neutrons? if we could add a proton to a fluorine nucleus, would the result still be fluorine? what if we added a neutron to a fluorine nucleus? explain?

Number of protons give atomic number, so Atomic number is 9.
Atomic mass =number of protons +number of neutrons=9+10=19

If we add 1 proton, then atomic number is going to be 10, and it would be Neon,
because number protons define atomic number and so type of element.
If we add  neutron, atomic number is not going to change, so it still would be Fluorine, but isotope of Fluorine with different atomic mass that would be equal 20.

a) 132 g NaCl consumed at 1.5 Atm & 290K

b) 93.2 g NaCl consumed at STP

Explanation:

F₂ + 2NaCl => 2NaF + Cl₂

Given 18L F₂(g) at 1.5Atm & 290K

moles F₂(g) = PV/RT = (1.5Atm)(18L)/(0.08206L·Atm/mol·K)(290K) = 1.135 mol F₂(g) consumed

moles NaCl consumed = 2(moles F₂) = 2(1.135) mol NaCl = 2.269 mol NaCl

mass NaCl = 2.269 mol NaCl x 58 g/mol = 131.61 g ≅ 132 g consumed at 1.5 Atm & 290K

Given 18L F₂(g) - same volume as in part a -  at STP

moles F₂(g) = PV/RT = (1.0Atm)(18L)/(0.08206L·Atm/mol·K)(273K) = 0.803 mol F₂(g) consumed

moles NaCl consumed = 2(moles F₂) = 2(0.803) mole NaCl = 1.607 mol NaCl

mass NaCl = 1.607 mol NaCl x 58 g/mol = 93.2 g NaCl consumed at STP