ScCl3 is covalent or a ionic

Which of the following elements would you expect to have the lowest ionization energy value? fluorine, lithium, neon, nitrogen

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.

Which of the following would have less momentum than a 52 kg cheetah running at 10 m/s?