Steel is the most commonly used metallic material. However, its annual loss due to corrosion is huge. Preventing metal corrosion
is a big issue in scientific research. The wrong description about metal corrosion below is A. Steel corrodes more easily in humid air than in dry air B. Steel corrosion in reality is the chemical change that takes place when steel reacts with the oxygen and water vapour in air. C. Aluminium is more active than the iron in steel. Therefore its ability to resist corrosion is weaker than steel. D. Painting on the surface of steel can prevent corrosion of the steel.
Polar molecules form when two atoms do not share electrons equally in a covalent bond.
A molecule is classified as a polar molecule when the arrangement of the atoms is such that one end of the molecule has a positive electrical charge and the other end has a negative charge.
A non-polar molecule does not have electrical poles.The electrons are distributed more equally.
Therefore, a non-polar molecule does not have a profusion of charges at the opposite ends. The majority of hydrocarbon liquids are non-polar molecules.
Explanation: Electron affinity generally increases from left to right and from bottom to top. Explanation: Periodic trends indicate that atomic radius increases up a group and from left to right across a period. Therefore, oxygen has a smaller atomic radius sulfur.
