Answer:
I think the best answer is (5) because catalyst are known to speed up a reaction without being changed
Trueeeeeeeeeeeeeeeee!!!!!
Answer:
Metalloids are metallic-looking brittle solids that are either semiconductors or exist in semiconducting forms, and have amphoteric or weakly acidic oxides. Typical nonmetals have a dull, coloured or colourless appearance; are brittle when solid; are poor conductors of heat and electricity; and have acidic oxides.
Explanation: