Answer:The atomic mass of the second isotope of an element X 17 amu with atomic number of 7 and it is represented by X-17.
Explanation:
Number of protons in isotope X-15,(p) = 7
Number of neutrons in isotope X-15,(n) = 8
Atomic mass of the isotope X-15 = (p) + (n) = 7 + 8 = 15 amu
Number of protons in second isotope of an element X,(p) = 7
Atomic number = Number of protons in an atom of an element
Number of protons in the isotopes of same element remains the same
Number of neutrons in second isotope of an element X,(n) = 10
Atomic mass of the second isotope of an element X= (p) + (n) = 7 + 10= 17 amu
The atomic mass of the second isotope of an element X 17 amu with atomic number of 7 and it is represented by X-17.
