Which statement correctly uses a description of time? The invention of the automobile began a new millennium.
The expansion of railroads marked the start of a new era.
The time from 1980 to 1989 was a century of economic growth.
The years 1900 to 1999 were a decade filled with many political changes.

What is avogadro’s number, and why is it useful

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.

Which of these is a physical property