Question

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

Answer 1

neutrons= mass number-atomic number

Answer 2

BUT WHATS THE 35 AND 9

Answer 3

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

Answer 4

THATS ALL AND IT SAYS (SHOW WORK)

Answer 5

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

Answer 6

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

Answer 7

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

Answer 8

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

Answer 9

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

Answer 10

AND SO FOR THE OTHER ONE IS 10

Answer 11

RIGHT

Answer 12

exactly

Answer 13

THANKS

Answer 14

no problem