articles

The difference between a chemical change and a physical change lies in how the change affects the composition a substance. A chemical change occurs on the molecular level and produces a new substance. However, a physical... More »

www.reference.com Science Chemistry Atoms & Molecules

The difference between matter and energy is that energy is produced from matter yet has no mass and is the capacity to do work while matter is the physical "stuff" in the universe. Matter needs energy to move. More »

www.reference.com Science Chemistry States of Matter

Extensive properties are those which depend on the amount of matter present, while intensive properties are those that do not change regardless of the amount of matter present. These are both classes of physical properti... More »

www.reference.com Science Chemistry States of Matter
similar articles

While physical change is the rearranging of molecules in a substance, a chemical change affects the intrinsic properties of a substance, altering its chemical composition. More »

www.reference.com Science Chemistry Atoms & Molecules

The chemical composition of table salt is NaCl. Table salt is a combination of sodium and chlorine, which form ionic bonds. More »

www.reference.com Science Chemistry Atoms & Molecules

The chemical composition of table salt is one atom of sodium (Na) to one atom of chlorine (Cl), known as sodium chloride (NaCl). Table salt also often has iodine added in for health reasons, but this does not change the ... More »

www.reference.com Science Chemistry Atoms & Molecules

The chemical composition of sand is primarily SiO2, or silica. Silica, which is also named as quartz, is a type of mineral that makes up most of the sand types like beach sand. More »

www.reference.com Science Chemistry Atoms & Molecules