Question

An element x has two isotopes x-15 has 7 protons and 8 nuetrons. Determine the atomic number and mass number of the second isotope, which has 10 nuetronsvin its nucleus

Answer 1

x-15
no. of proton is 7
so atomic no. is 7 for both the isotope
mass no. for second isotope is 10+7=17

Answer 2

✌️Hallo ✌️

☺️Atomic number is 7 the isotope contain the same number of protons
☺️The mass number is 17

Thank...❤️❤️