Sulfur dioxide (also sulphur dioxide, sulfurous anhydride or sulphurous anhydride) has the chemical formula SO2. The gas is irritating to the lungs and is frequently described as smelling of burning ...

Chemical reactions make new chemicals. Atoms are rearranged during a chemical reaction, but the number of atoms does not change. Evidence of chemical reactions includes a large temperature change, ...

Chemical and mineral sunscreens shield your skin from the harmful effects of the sun’s UV rays in very different ways. “Mineral sunscreen ingredients, zinc oxide and titanium dioxide, are small ...