Because the moon orbits the earth and when the moon gets in front of the sun it blocks the sunlight and then it becomes night
Because more than one substance was released (following a color change signifying a chemical reaction), the sample was indeed, a compound.
Answer:
the time required for one half of a sample of a radioisotope to decay
<span>The functional group in organic chemistry is the set of atoms attached to the carbon skeleton that often determine the properties of an organic compound.
Following are major functional groups that are present in an organic compound. carboxylic acid, ester, ether, amine, amide, thiol, halide, alkene, alkyne, phenol, alcohol, aldehyde, ketone, etc.</span>
