Which of the following pairs of elements is most likely to form a covalent bond? a. sodium and chlorine b. magnesium and oxygen c. phosphorus and bromine d. copper and oxygen

Two liquids are poured into a beaker. after a few seconds, the beaker becomes warm. which of the following best describes this reaction? a. an exothermic reaction b. a decomposition reaction c. an endothermic reaction d. a single-displacement reaction

Describe the hybridization of each carbon and nitrogen atom in each of the following structures

Which us an example of the practical pursuit of alchemy? a. linking spiritual characteristics with material substances b. forming perfect substances c. developing metalworking technique d. transforming base metals