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Cutting sodium metal with a scalpel.
The shiny exposed metal surface reacts rapidly with oxygen and water in the air, forming a duller layer of sodium oxide and hydroxide. Then the sodium metal is dropped into water. The reaction produces hydrogen gas and sodium hydroxide....
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Collection of hydrogen gas. The gas has been produced by the action of hydrochloric acid on magnesium metal in a test tube. The gas is passed through a tube into a water bath, where it is collected in an inverted test tube
Collection of hydrogen gas. The gas has been produced by the action of hydrochloric acid on magnesium metal in a test tube. The gas is passed through a tube into a water bath, where it is collected in an inverted test tube
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Collection of hydrogen gas. The gas has been produced by the action of hydrochloric acid on magnesium metal in a test tube. The gas is passed through a tube into a water bath, where it is collected in an inverted test tube
Collection of hydrogen gas. The gas has been produced by the action of hydrochloric acid on magnesium metal in a test tube. The gas is passed through a tube into a water bath, where it is collected in an inverted test tube
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Biomass energy plant behind a wheat field Energiewende Biogas
Biogas plant behind a wheat field. Selective focus on the middle of the field. HD and Real Time
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Collection of hydrogen gas. Chemist setting up a water-filled test tube for the collection of hydrogen gas. The gas is produced by the action of hydrochloric acid on magnesium metal in the test tube at left
Collection of hydrogen gas. Chemist setting up a water-filled test tube for the collection of hydrogen gas. The gas is produced by the action of hydrochloric acid on magnesium metal in the test tube at left
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Test for hydrogen gas. A lit splint is held to the gas, igniting it with a characteristic squeaky pop. The gas was produced by the reaction of magnesium with hydrochloric acid, in the test tube at left
Test for hydrogen gas. A lit splint is held to the gas, igniting it with a characteristic squeaky pop. The gas was produced by the reaction of magnesium with hydrochloric acid, in the test tube at left
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Biomass energy plant behind a wheat field Energiewende Biogas
Biomass energy plant behind a wheat field Energiewende Biogas
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close up : draw tube from liquid nitrogen tank
close up : draw tube from liquid nitrogen tank
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MS R/F Prawn dish preparation at a kitchen grating potato / Sao Paulo, Brazil
MS R/F Prawn dish preparation at a kitchen grating potato / Sao Paulo, Brazil
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MS Prawn dish preparation at a kitchen grating potato / Sao Paulo, Brazil
MS Prawn dish preparation at a kitchen grating potato / Sao Paulo, Brazil
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Obama comments on Keystone
U.S. President Barack Obama addresses the prospects for the approval of the Keystone pipeline Obama comments on Keystone at Dahlgren Chapel courtyard Georgetown University on June 25, 2013 in Washington, DC (Footage by Getty Images)