Element x y z forms advenir track if the atomic mass of x is 7 and that of z is 23 then what will be the atomic mass of y

Element x y z forms advenir track if the atomic mass of x is 7 and tha

1.	Element x y z forms advenir track if the atomic mass of x is 7 and that of z is 23 then what will be the atomic mass of y
Answer» it will be 15............