Question

predict formula of stable binary compound that would be prepared by: 1. element with at no. 55 and 35 2.element with atomic no. 56 and oxygen 3.element with atomic number 15 and fluorine 4.Pb with atomic no. 16.....please answer this question fast.....

Answer 1

Answer:

$324863 \sqrt[y { { \tan( \cos( \sin( \csc(e) ) ) ) }^{?} }^{?} ]{?}$