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4 giorni fa · Samples of white phosphorus almost always contain some red phosphorus and accordingly appear yellow. For this reason, white phosphorus that is aged or otherwise impure (e.g., weapons-grade, not lab-grade WP) is also called yellow phosphorus.
- white, red and violet are waxy, black is metallic-looking
- white, red, violet, black and others (see Allotropes of phosphorus)
- 5.2 (silicon = 100)
4 giorni fa · The Yellow Peril (also the Yellow Terror, the Yellow Menace and the Yellow Specter) is a racist color metaphor that depicts the peoples of East and Southeast Asia as an existential danger to the Western world.
1 giorno fa · The Sun is a G-type main-sequence star (G2V), informally called a yellow dwarf, though its light is actually white. It formed approximately 4.6 billion years ago from the gravitational collapse of matter within a region of a large molecular cloud.
5 giorni fa · yellow jacket, any of 35–40 species (genus Dolichovespula or Vespula) of social wasps, principally of the Northern Hemisphere. Despite the common name yellow jacket —which is used in reference to the typical coloration of the abdomen, with yellow and black markings—some species are white and black, and others are marked with red.
- The Editors of Encyclopaedia Britannica
4 giorni fa · Welcome to the vibrant world of Yellow flowers! These blooms add a refreshing hue to any space and attract wildlife, too! Table of contents. 1. Billy Buttons. 2. Yellow Corydalis. 3. Yellow Cosmos. 4. Yellow Columbine. 5. Yellow Primrose. 6. Geranium. 7. Yellow Alpine Poppy. 8. Yellow Bird’s Foot Trefoil. 9. Yellow Flag Iris. 10. Yarrow. 11.
- Senior Editor
1 giorno fa · La Yellow School forma giovani disabili per l'inserimento lavorativo al San Paolo Palace, segnando un esempio di inclusione e autonomia.
5 giorni fa · Sputum is a mixture of saliva and mucus coughed up from the respiratory tract, typically as a result of infection or chronic conditions like bronchitis, pneumonia, or tuberculosis. It can be clear, yellow, green, or tinged with blood, and its analysis helps diagnose various respiratory diseases.
