A proton is a stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron, but of opposite sign.
yes because alfa carbon has one protan
Operture.com is the only company offering the Dvorine Pseudoisochromatic Plates (color testing). Developed by Israel Dvorine, this test book provides a total of 23 plates which include 1 demonstration plate, 14 numerical test plates, and eight plates used for 'path tracing' with pediatric and illiterate patients. Tests for red/green color deficiencies. Provides differential diagnosis for protan and deutan defects and classifies three levels of severity. No tritan plates are provided. Included is a color naming test of medium and low-saturation colors Comes in a black notebook and the pages are removable for they can be shuffled. The Dvorine is the standard color screening test (FAA approved) when it comes to aviation and similar industries that require color testing. The Dvorine Pseudoisochromatic Plates are reportedly more accurate tests than the Ishara plate.
They don't... Blind people are enable to see any colour of any kind. (If they're fully blind). Do you mCean what they think about what colours might look like? Color blind people do not see the actual color and will see only black, white, or grey.