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Praseodymium is a chemical element; it has symbol Pr and the atomic number 59. It is the third member of the lanthanide series and is considered one of the rare-earth metals. It is a soft, silvery, malleable and ductile metal, valued for its magnetic, electrical, chemical, and optical properties. It is too reactive to be found in native form ...
YCbCr. A color image and its Y′, C B and C R components. The Y′ image is essentially a greyscale copy of the main image. YCbCr, Y′CbCr, or Y Pb/Cb Pr/Cr, also written as YCBCR or Y′CBCR, is a family of color spaces used as a part of the color image pipeline in video and digital photography systems. Y′ is the luma component and C B and ...
The isotopes of praseodymium range in atomic weight from 120.955 u ( 121 Pr) to 158.955 u ( 159 Pr). The primary decay mode before the stable isotope, 141 Pr, is electron capture and the mode after is beta decay. The primary decay products before 141 Pr are element 58 ( cerium) isotopes and the primary products after are element 60 ( neodymium ...
Use: Civil and state flag, civil and state ensign: Proportion: 2:3: Adopted: December 22, 1895; 128 years ago () by pro-independence members of the Revolutionary Committee of Puerto Rico exiled in New York City; members identified colors as red, white, and blue but did not specify color shades; some historians have presumed members adopted light blue shade based on the light blue flag of the ...
Color blindness or color vision deficiency ( CVD) is the decreased ability to see color or differences in color. [ 2] The severity of color blindness ranges from mostly unnoticeable to full absence of color perception. Color blindness is usually an inherited problem or variation in the functionality of one or more of the three classes of cone ...
A diagram demonstrating additive color with RGB. The RGB color model is an additive color model [1] in which the red, green and blue primary colors of light are added together in various ways to reproduce a broad array of colors. The name of the model comes from the initials of the three additive primary colors, red, green, and blue.
A full house, also known as a full boat or a tight or a boat (and originally called a full hand), is a hand that contains three cards of one rank and two cards of another rank, such as 3 ♣ 3 ♠ 3 ♦ 6 ♣ 6 ♥ (a "full house, threes over sixes" or "threes full of sixes" or "threes full"). [17] [18] It ranks below four of a kind and above a ...
Dark blue flag. Dark blue Monoestrellada (1952) with navy blue. Dark blue, or navy blue, flag of Puerto Rico (1952), matching the colors of the dark blue original Lares flag, one of two original versions of the flag available today, uses the following color shades: Colors scheme. Blue.