What kind of elements are columns 1,2 and 13-18 on the periodic table?

Select the correct answer how does the heat content of the reaction change in the process of photosynthesis when a glucose molecule is formed? ca the value of is negative the value of qis positive the value of a remains constant the value of a decreases the value of equals zero e

What must happen before a body cell can begin mitotic cell division

Why is the melting of ice a physical change ?