Science Source General Science

A computer-generated model of the crystalline structure of quartz. Quartz is a silicate crystal with a trigonal structure. Silicon atoms are in white...

A computer-generated model of the crystalline structure of quartz. The yellow tetrahedra represent silicon tetroxide units. A silicon atom is located...

Computer-generated model of a crown ether (18crown6) encircling a sodium ion. Crown ethers are powerful solvating agents: crown ethers can bind to ion...

Computer-generated model of a neon atom. The nucleus, at center, is too small to be seen at this scale and is represented by the flash of light. Surro...

Computer model of a C60 buckminsterfullerene containing a caged potassium ion.

Crystalline structure of graphite, an allotrope of carbon. Carbon atoms are connected into discrete layers of rings by aromatic bonds. Free sliding be...

Crystalline structure of graphite, an allotrope of carbon. Carbon atoms are connected into discrete layers of rings by aromatic bonds. Free sliding be...

Food coloring in ice water (2 of 3).

White phosphorus in a test tube and sodium on a watch glass.

Iodine sublimation. Iodine at room temperature is a black solid. Gentle heating results in the formation of a purple gas. This solid-gas transition is...

Anhydrous copper sulfate.

Anhydrous copper sulfate.

Anhydrous copper sulfate.

Displacement reaction. Bromine gas (yellow) is displaced from a solution of potassium bromide through which chlorine is being bubbled. Chlorine is mor...

Magnesium burning in oxygen.

Sodium Hydroxide crystals, (NaOH).

A woman holds up polarizing filters, which increase color saturation and reduce reflected light.

A woman holds a polarizing filter, which increases color saturation and reduces reflected light.

A thermite reaction, in which iron oxide (FeO) reacts with aluminum (Al) to produce molten iron.

Ammonium nitrate explosion.

Hydrogen burning in chlorine.

A ring expanding due to heat. See photo 2k4244 for the rest of the experiment.

A ring expanding due to heat. See photo 2k4245 for the rest of the experiment.

Iodine crystals.

Phenol crystals.

Silicon bar in sand.

Heating a wire causes electrical resistance (a ratio of the degree to which an object opposes an electric current through it).

Silicon and silicon wafer with computer chips.

Aluminum crystal.

Soft and brittle plastics: Styrofoam and hard plastic.

Heavy water, (deuterium oxide), & water ice cubes.

Bromine in a vacuum flask.

Dry ice in a ziploc bag lifts a book.

Mercury in a graduated cylinder.

Cleaving a potassium bromide crystal.

Zinc reacting with hydrochloric acid (HCL).

Food coloring in ice water (3 of 3).

Food coloring in ice water (1 of 3).

Silver

Additive primary colors.

The words "mirror image" are reflected in a mirror.

A simple demonstration of light refraction. Light travels at different speeds in different optical mediums, such as water and air. When light from an...

A clock photographed only by the fluorescent light of its numbers using daylight film.

Equilateral prism (3 of 3).

Equilateral prism (1 of 3).

Equilateral prism (1 of 3).

A girl places her hands on a Van de Graaf generator, a device that transmits excess electrons. Strands of her hair repel each other because they are s...

A girl places her hands on a Van de Graaf generator, a device that transmits excess electrons. Strands of her hair repel each other because they are s...

Computer Model of a C60 Fullerene.

Photo taken with ultraviolet (UV) light on daylight slide film.