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.

Which statement describes how phase changes can be diagrammed as a substance is heated? the phase is on the y-axis and the temperature is on the x-axis. the temperature is on the y-axis and the phase is on the x-axis. the time is on the y-axis and the temperature is on the x-axis. the temperature is on the y-axis and the time is on the x-axis.

Which type of precipitation would most likely form when the surface air temperature is slightly below freezing and the air temperature increases as you move upward away from the ground?

Draw two cyclic constitutional isomers of cis-1