The gold object being tested is scraped on the touchstone. then, acid is poured onto the streak. why do you think that the more gas bubbles the streak produces, the lower the purity of the gold?

Suppose the universe were completely empty except for one object-a solid sphere moving through space of 100 km/s. what sort of path would the object be moving in? explain your answer

16. why must the number of electrons lost equal the number of electrons gained in every redox reaction? use 3 – 4 sentences in your own words to address this question. 18. what type of radiation is emitted when chromium-51 decays into manganese-51? show the nuclear equation that leads you to this answer. 19. a radioactive nucleus alpha decays to yield a sodium-24 nucleus in 14.8 hours. what was the identity of the original nucleus? show the nuclear equation that leads you to this answer.

The equation picture below shows which type of nuclear reaction u 235 + n x e 134 + sr 100 + 2n