Elementul cu numărul de masă 27, are 3 electroni pe stratul M. Se cere: a. poziţia elementului în tabelul periodic;
b. denumirea elementului;
c. numărul de neutroni.

Harvey kept a balloon with a volume of 348 milliliters at 25.0˚c inside a freezer for a night.  when he took it out, its new volume was 322 milliliters, but its pressure was the same.  if the final temperature of the balloon is the same as the freezer’s, what is the temperature of the freezer? the temperature of the freezer is  kelvins.

Look at the bean data from days 4–6. use these data to explain how natural selection changed the number of dark red walking beans over time. writing part

How many grams of iron can be made from 16.5 grams of fe2o3