Which radioisotope is an artificial transmutation?

Noble gases are the most reactive elements on the periodic table. a. true b. false

Which of the following is always a reactant in a combustion reaction? oxygen nitrogen hydrogen carbon

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.