Science Source General Science

A drop of aqueous potassium chromate is added to a solution of lead (II) nitrate. This creates an orange-yellow precipitate, lead (II) chromate, and p...

Carbonate formation at the mouth of bottle containing sodium hydroxide (NaOH). Sodium hydroxide forms a strong alkaline solution when dissolved in a s...

A strip of litmus paper turns red in more acidic solutions and blue in more basic solutions.

Pouring mercury.

Tin metal.

A metal bar is heated by an acetylene torch.

Sodium chloride, strontium and boric acid burning in methanol. Each produces a distinctive flame.

Soap bubbles.

Mobius strip, a one-sided plane.

Tank of Helium, with balloons.

Crayons fluorescing under heavy ultraviolet (UV) filtration.

Prying open a paint can.

The incombustibility of asbestos.

Flame test for strontium. The color of the flame is caused by electrons that have been excited to a higher energy state. When they relax they emit ene...

Heating a copper strip.

Silica gell packs and beads used for packaging CD player. Silica gel used to absorb moisture in electronic component chemistry.

Plastic under polarized light.

Plastic under polarized light.

Benzene molecule, showing restricted zone of electrostatic potential in its equatorial plane.

A computer-generated cutaway view of the molecular surface of bromonium ion. Areas of reactivity are denoted in blue.

Cutaway view of a helium atom displaying 1s & 2s orbitals.

Water filter with a pitcher of H2O. The filter separates chemicals in the water.

A lump of the element sulfur.

Silica gel used in packaging for a CD player. Silica gel is a granular form of silica, synthetically manufactured from sodium silicate. It has an extr...

The Foucault pendulum, named after the French physicist Leon Foucault, was conceived as an experiment to demonstrate the rotation of the Earth. It is...

Potassium burning in a flame producing a lilac flame. The colour of the flame is caused by electrons that have been excited to a higher energy state....

Flame test for copper (Burning Copper Salt). The flame is colored due to the fact that the salt is vaporized by the flame and excited to emit radiatio...

Flame test for rubidium (Rb).

Flame test for sodium (Na). Sodium burning in the flame producing an orange flame. The colour of the flame is caused by electrons that have been excit...

Flame test for cesium (Cs).

Flame test for barium (Ba).

Silicon.

Silicon.

Melting lead.

Potassium thiocyanate reacting with iron (III) nitrate.

Gallium in a test tube melts from the heat of a hand.

Roll of aluminum foil.

Lead melting over a bunsen burner.

Magnesium oxide (MgO) is used in an electrical heating element. Its high dielectric strength and average thermal conductivity make it well-suited to t...

Rusting iron.

Tank of liquid helium

Battery acid corrosion.

Inner workings of a safe.

Butane lighter.

Water boiling in a beaker.

Cobalt Chloride going from cold to hot. A common use for cobalt(II) chloride was for the detection of moisture. A concentrated aqueous solution is red...

Cobalt Chloride going from cold to hot. A common use for cobalt(II) chloride was for the detection of moisture. A concentrated aqueous solution is red...

A rechargeable nickel-cadmium battery.

Dry ice in a sealed plastic bag. The frozen carbon dioxide will sublimate into a gas and cause the bag to expand. 2 of 3.

Dry ice is placed in a plastic bag. The carbon dioxide will sublimate into a gas and cause the bag to expand. 1 of 3.