4.a) calculate the mass of an ion that has a specific charge of 1.20x10^7 C kg^-1 and a negative charge of 3.2x10^-19 C.
I got 2.67x10^-12 .. That was relatively straight forward but
B). The ion has 8 protons In its nucleus. How many neutrons and how many electrons does it have?
How do I get the neutron number ! Am
Really confused .. I know how to get electron but not the neutron number? Can someone go through it step to step with the calculations on how you would get the proton number
I got 2.67x10^-12 .. That was relatively straight forward but
B). The ion has 8 protons In its nucleus. How many neutrons and how many electrons does it have?
How do I get the neutron number ! Am
Really confused .. I know how to get electron but not the neutron number? Can someone go through it step to step with the calculations on how you would get the proton number
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Your arithmetic is wrong!
mass = charge/specific charge
= 3.2x10^-19/(1.20x10^7)
= 2.67x10-26kg (not 2.67x10^-12kg)
The mass of a nucleon (proton or neutron) is about 1.67x10^-27kg. The mass of any electrons present is negligible.
Number of nucleons = 2.67x10-26 / (1.67x10^-27) = 16 (nearest integer)
Since there are 8 protons, number of neutrons = 16 - 8 = 8
(So the ion s a doubly-ionised O-16 atom.)
mass = charge/specific charge
= 3.2x10^-19/(1.20x10^7)
= 2.67x10-26kg (not 2.67x10^-12kg)
The mass of a nucleon (proton or neutron) is about 1.67x10^-27kg. The mass of any electrons present is negligible.
Number of nucleons = 2.67x10-26 / (1.67x10^-27) = 16 (nearest integer)
Since there are 8 protons, number of neutrons = 16 - 8 = 8
(So the ion s a doubly-ionised O-16 atom.)