An atom has an electron configuration of
1s², 2s², 2p⁶, 3s², 3p3
how many valence electrons does the atom have?

During which time interval does the object travel approximately 10 meters

In which of these cases are the two wave points considered to be in phase with each other?

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.