“representative elements”? which groups of the periodic table contain the “representative elements”?

Which object forms when a supergiant runs out of fuel? a red giant a black hole a white dwarf a neutron star

Seltzer water is created by placing water under pressure with carbon dioxide gas. which of the following statements best describe seltzer water: a. the solution will be slightly acidic b. the solution will be slightly basic. the solution will be strongly acidic. d. the solution will be strongly basic. e. the solution will be neutral

What term is missing from the central region that describes hypotheses, theories, and laws? popular predictable mathematical falsifiable