What color does red represent in the periodic table

In a closed or isolated system , matter can not be created or destroyed. it can change forms but is conserved true or false

What is the percentage of hydrogen in nitrogen trihydride

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