Chemistry
- Chemistry
Scientists Say: Base
Bases are chemicals that contain negatively charged chemical groups made from oxygen and hydrogen. They lend coffee its bitter flavor and have pH rankings higher than 7.0.
- Chemistry
Scientists Say: Acid
When a chemical tastes sour, ranks below 7.0 on the pH scale and has many hydrogen ions in its solution, it gets a special name.
- Chemistry
News Brief: 2016 brings four new elements
U.S., Russian and Japanese scientists have just been credited with official discoveries of elements 113, 115, 117 and 118. Next up: Naming them.
- Chemistry
Mystery ‘earmuffs’ sit deep inside Earth
Two vast blobs in Earth’s lower mantle could result from a “trainwreck” of ancient colliding tectonic plates.
- Chemistry
Rocks hold clues to ancient die-offs
Rocks that formed during ancient mass-extinction show that the oceans back then had become very warm. That was the last time Earth spewed carbon dioxide into its atmosphere at a rate similar to what is happening today.
- Chemistry
Scientists Say: Keratin
Keratin is a fibrous protein that gives our nails and hair their strength.
- Agriculture
Building better, safer soils
Engineering safer soils for urban growers can reduce the risk of lead exposure and let low-income families enjoy more fresh fruits and vegetables.
- Chemistry
Scientists Say: Joule
A joule is the amount of work done when a force of one newton moves an object one meter. It’s also the energy required to produce one watt for one second.
- Chemistry
Scientists Say: Radioactive
Some atoms have unstable centers. They periodically give off energy. This activity has a special description.
- Chemistry
Some 3-D printing can leave toxic taint
The ”ink” inside some 3-D printers can leave toxic traces. In tests, these chemicals harmed baby fish. But lighting could render the parts safer.
- Chemistry
Scientists Say: Osmosis
When two solutions are separated by a membrane where only the liquid can cross, the liquid will move from the side with a low concentration of dissolved materials to the side with a higher concentration. This movement has a special name.
- Chemistry
Scientists Say: Dioxide
Carbon dioxide, sulfur dioxide and zirconium dioxide all have something in common. They are all molecules with two oxygens bound to some other element.
