Question

if an element y has atomic number 9 and element x has atomic number 13. waht is the formula of the compound formed between them​

Answer 1

Atomic no 9= fluorine,F^-1.  And atomic no =13 aluminum ,Al^+3

Answer 2

AlF₃ IS CORRECT FORMULA

THEIR ATOMIC NUMBERS ARE :

Al = 13

F = 9