Credit: RHYS LEWIS & MINH TAN PHAM, AHS, DECD, UNISA/SCIENCE PHOTO LIBRARY

Caption: Alkali metals reacting in water. Footage of (from left to right) three alkali metals lithium (Li), sodium (Na), and potassium (K) reacting in water (H20). The alkali metals are highly reactive metallic elements that float on water and react with it. These exothermic (heat-producing) reactions form the corresponding hydroxide (e.g. LiOH) and hydrogen gas (H2). The reactivity increases from lithium to potassium. The potassium ignites and burns with a purple flame. The piece of sodium fizzes and moves around on the water's surface, as do the smaller pieces of lithium. The smaller pieces of lithium don't react more vigorously than the sodium, despite having a larger surface area. By the end of the clip, nearly all the metals have finished reacting.

Release details: Model release not required. Property release not required.

Keywords: 3 elements, alkali metal, chemical, chemist, chemistry, clip, demonstration, demonstrator, education, educational, element, energy, exothermic, experiment, film, fizzing, flame, footage, gas, h2, h2o, heat, human, hydrogen, koh, lab, laboratory, li, lioh, liquid, lithium, metallic, motion, na, naoh, one person, people, person, potassium, purple flames, reaction, reactions, reactive, reactivity, school science, scientist, sodium, solid, sound, studio shot, three, trio, video, water

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Alkali metals reacting in water

K004/5237 Rights Managed

Downloadable master

Duration: 00:00:50.1

Frame size: 1920x1080

Frame rate: 25

Audio: Yes

Format: QuickTime, Photo JPEG 100%, progressive scan, square pixels

File size: 871.0M

Original

Capture format: Sony FS700

Codec: Apple ProRes 422 HQ

Please contact Science Photo Library if you require the original, or other formats.

 

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