Where on the periodic chart are the high values for the three periodic trends we have studied?

What does x represent in the formula for the compound xcl4?

The covalent compound acetylene, which is the fuel of the oxyacetylene torch used by welders, has the molecular formula c2h2. the covalent compound benzene, a commercial solvent, has the molecular formula c6h6 each of these covalent compounds contains carbon and hydrogen atoms in a one-to-one ratio. would it be correct to write the chemical formulas of each as ch? explain.

Frictional forces acting on an object are often converted into energy, which causes the temperature of the object to rise slightly.