The trend for ionization energy is a general increase from left to right across a period. however phosphorus is found to have higher first ionization energy value than sulfur. explain this exception to the general trend in terms of electron arrangements and attraction/repulsion

Compare and contrast the bohr model and the electron cloud models of the atom.

Although respiratory organs vary across different organisms, they all contain respiratory surfaces that have a large surface area and are extremely thin. explain why having an extremely thin respiratory surface with a large surface area is advantageous for the process of gas exchange

How many liters of 3.0 m naoh solution will react with 0.60 liters of 4.0 m h2so4? h2so4 + naoh → na2so4 + h2o 1.2 l 1.6 l 2.4 l 2.8 l