What determines chemical properties and reactions? a. color of a substance b. size of the molecules c. atomic structure and bonds d. physical properties

How do scientists think that gravity affected the formation of our solar system?

The characteristic of two different types of reactions are shown below. reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of and element. which statement is true about the atoms of the elements that participate in the two reactions? a: their identity changes in both reaction a and b. b: their identity changes in reaction a but not b. c: their identity changes in reaction b but not a. d: their identity remains the same.

What does the symbol (–hfus) indicate in a phase change?