What are the different "isotopes" of water? During the winter months, the snow that falls over Greenland contains less of the heavy isotopes of water. Why is this?

Why aren't the stains like crystal violet and safranin washed away with water during simple staining?

Are these strong bases, neutral, strong acids, weak acids or weak base household bleach (ph=12.6) fluid in a car's battery (ph of less than 1.0) milk (ph=6.7) stomach contents (ph=2.2) pure water (ph=7)

Mineral rich water heated by newly found oceanic crust escapes through cracks in the ocean floor called