Question

An element X reacts with oxygen to form XO2 and with chlorine to form XCl4. XO2 is a white solid that melts at high temperatures above 1000°c.

Answer 1

i think element x is carbon

yup its carbon only

hope it hrlps u

Answer 2

the element is carbon because in XCl4 by Criss cross method the valency of X is 4 which is carbon