Why is the data for water different from the elements, hydrogen and oxygen? a) properties of compounds differ from the properties of their respective elements. b) chemical properties of elements are always the same as the compounds they make up. c) physical properties of elements are the same as the compounds they make up, generally. d) the physical properties of compounds are the same as the physical properties of the elements that make it up but the chemical properties are different.

Asample of radium-226 will decay 1/4 of its original amount after 3200years. what is the half-life of radium-226?

24 points and brainliest to anyone who can answer under 10 minutes with best ! the table below shows the role of different substances during photosynthesis. substance role during photosynthesis glucose stores chemical energy water combines with glucose to form carbon dioxide chlorophyll traps sunlight which of the following statements would correct one of the roles listed in the table? glucose combines with carbon to form water. chlorophyll reacts with light to produce carbon dioxide. water combines with carbon dioxide during photosynthesis. chlorophyll stores chemical energy needed for photosynthesis.

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