This is a mixture in which two or more substances are so completely blended that is looks like one substance.

Solution. because the substances can't go back to their original form. like kool aid, when its mixed you cant separate the powder and the water again.

You use the atomic number to find out how many protons and neutrons there are in the atom. you use the atomic mass to find out how many protons and electrons there are in the atom. 

The correct answer is:   bri hope this answer was ! : )