Why is it hard for scientists to change lead into gold? scientists would have to change the number of protons in lead atoms. scientists would have to change the number of electrons in lead atoms. scientists would have to change the number of neutrons in lead atoms. scientists would have to change the number of protons and neutrons in lead atoms.

well off of my head we know that the perfume bottle is most likely opened, or broken. i can also tell it is moving at low and high concentration because it is covering the other side of the room. what we can obtain from this information is it explains why the odor can be detected at the other side of the room.

why is arctic sea ice important? arctic sea ice keeps the polar regions cool and moderate global climate. sea ice has a bright surface; 80 percent of the sunlight that strikes it is reflected back into space. as sea ice melts in the summer, it exposes the dark ocean surface.