How many neutrons are in the following:
a. ^35 17CI B. ^19 9F

Question

How many neutrons are in the following:
a. ^35  17CI        B. ^19  9F

anonymous · Answer

neutrons= mass number-atomic number

anonymous · Answer

BUT WHATS THE 35 AND 9

anonymous · Answer

is there any other info available or is that all that is given?

anonymous · Answer

THATS ALL AND IT SAYS (SHOW WORK)

anonymous · Answer

i think 35 and 19  represent the mass number and the 17 and 9 represent the protons.

anonymous · Answer

http://en.wikipedia.org/wiki/Isotopes_of_chlorine SAYS THAT IS 18 NEUTRONS

anonymous · Answer

so then just look at the values for mass on the periodic table for elements Cl F

anonymous · Answer

you are given all the info you need in the problem stated. your atomic numbers are 9 and 17

anonymous · Answer

and 35  and 19 are the atomic mass. so like the wikipedia article said Cl has 18 neutrons because you subtract the atomic mass by atomic number. in other words 35- 17

anonymous · Answer

AND SO FOR THE OTHER ONE IS 10

anonymous · Answer

RIGHT

anonymous · Answer

exactly

anonymous · Answer

THANKS

anonymous · Answer

no problem