# data[].attributes.body
3a) 80.0(3sf) 3b) They both are from the same element, bromine. 3c) They have different mass.

# data[].attributes.body
A 80

B same elemnt

c differnt number proton or smth

# data[].attributes.body
3a) 80.0 (3sf)

3b) They are isotopes

3c) They have different mass number