What is the typical particle size of the particles in a colloid? A. none of these
B.1 angstrom
C. from 1 nm to 1000 nm
D. less than 1 nm
E. from 1000 nm to 5000 nm

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 term is missing from the central region that describes hypotheses, theories, and laws? popular predictable mathematical falsifiable

In the following table, all the columns for the element calcium are filled out correctly. element electron structure of atom electron structure of ion net ionic charge calcium 1s22s22p63s23p64s2 1s32s22p63s23p64s1 +1 true false