Materials


Density Definition in Science

DENSITY DEFINITION Density is defined as mass per unit volume. The symbol most commonly used for density is ρ (the lower case Greek letter rho). The capital letter D is also used. Density is an intensive property of matter, which means the size of a sample does not affect its value. Density commonly is expressed in […]


Dopants in phosphors can produce a range of glow in the dark colors. (Joel Filipe)

Make Glow in the Dark Powder From Oyster Shells (Calcium Sulfide Phosphorescence)

In the olden days, back before we could buy glow powder on the internet, people made it themselves. Sometimes they took a scientific approach, mixing chemicals to see if anything cool happened. More often than not, glowing materials were discovered by accident. For example, the discovery that rotting corpses and […]


Disposable latex gloves offer limited protection. (Rachel Haller, Flickr)

Handy Glove Selection Guide for Scientific Research 1

Everyone knows it’s important to choose the right size of glove, but fit isn’t the consideration for glove selection. Choosing the right material is critical for protection from chemicals, biological agents, heat, and cold.The first step for selecting the proper glove for the job is identifying the hazards. Ask yourself: […]


This is the structure of sodium bicarbonate, also known as sodium hydrogen carbonate or baking soda.

Sodium Bicarbonate Facts – Baking Soda or Sodium Hydrogen Carbonate

These are facts, chemical properties and physical properties of sodium bicarbonate, which is also known as baking soda or sodium hydrogen carbonate. Sodium Bicarbonate Facts and Properties CAS number 144-55-8 name sodium bicarbonate IUPAC name sodium hydrogen carbonate common name baking soda formula NaHCO3 compound formula CHNaO3 molecular weight 84.0066 […]