An unknown substance can be identified by
its mass.
a flame test
its density
b and c

Consider the elements bromine and chlorine; which elements has a larger ionic radius ?

An animal cell loses the ability to convert energy stored in food to energy that the cell can use. which of the cell's organelles has stopped working? a.the mitochondria b.the nucleus c.the vacuoles d.the endoplasmic reticulum

How could a student test the effect of removing heat from a gas that is stored in a sealed container? what must occur in order for matter to change states?