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Atomic number 6, atomic weight 12.01115. Manganese (Mn): Manganese is a brittle, metallic element that exists in the ore of pyrolusite. When making steel, it reacts with sulfur and helps to ...

Protons sit in the nuclei of all atoms, but they are not fundamental particles: They are made of three quarks held together by the strong nuclear force. The strength of this interaction is actually ...

Aluminum is a metal in group IIIA of the periodic table with atomic number 13, an atomic weight of 26.982, and a density of 2.70. It has a melting temperature of 660 C. The electronic configuration of ...

Kerry Katona has opened up about the sad reason she's been losing weight, admitting she is now on a mission to gain back some ...

Silicon is a semiconductor in group IVA of the periodic table with atomic number 14, an atomic weight of 28.086, and a density of 2.33 Mg/m 3. It melts at 1410 C. The electronic configuration of the ...

SUNAYANA: But even before these particles were discovered, scientists of the time tried to arrange the elements into some kind of order by their atomic weight and properties. And it took about a ...

Robert Oppenheimer's name has become almost synonymous with the atomic bomb, and also with the dilemma facing scientists when the interests of the nation and their own conscience collide.