5. protons and 10 neutrons? If we could add a proton to this fluorine atom, woul

Question

5. protons and 10 neutrons? If we could add a proton to this fluorine atom, would the restu still be fluorine? What I we added a neutron to the fluorine atom? b. The most common isotope of gold has atomic number 79 and atomic mass number 197. How many protons and neutrons does it contain? If it is triply ionized, how many electrons does it have? c Uranium has atomic number 92. Its most common isotope is 23U, but the form used in nuclear bombs and power plants is these two isotopes of uranium? U. How many neutrons are in each of

Explanation / Answer

5)

a) Flourine has 9 protons and 10 neutrons

Atomic Number = Number of protons = 9

Mass Number = Atomic Number + Number of neutrons = 9 + 10 = 19

If we add a proton to the flourine, then it won't be flourine anymore, since the atomic number will become 10, which is the atomic number of Neon gas

Adding neutron, it will still remain Flourine with atomic number 9 and mass number 20 (with 11 neutrons)

b)

Number of Protons = Atomic number = 79

Number of neutrons = Mass number - Atomic Number = 197 - 79 = 118

Triply ionized means the charge on Au(+3)

Number of Protons = Number of electrons + 3

Number of electrons = 79 - 3 = 76

c)

Number of neutrons in U-235

Number of protons + Number of neutrons = 235

Number of neutrons = 235 - 92 = 143

Number of neutrons in U-238

Number of protons + Number of neutrons = 238

Number of neutrons = 238 - 92 = 146

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