Answer: D) chromium Explanation: Stainless steel contains 18% chromium and 82% steel

Ionic bonding is a type of chemical bond in which valence electrons are lost from one atom and gained by another.. This bond generates two oppositely charged ions. In ionic bonds, the metal loses electrons to become a positively charged cation, whereas the nonmetal accepts those electrons to become a negatively charged anion.   Example :: One example of an ionic bond is the formation of sodium fluoride, NaF, from a sodium atom and a fluorine atom. In this reaction, the sodium atom loses its single valence electron to the fluorine atom, which has just enough space to accept it. The ions produced are oppositely charged and are attracted to one another due to electrostatic forces.

विश्व की सबसे लंबी नदी नील नदी है। इसलिए, सही उत्तर (डी) नील (नील) है। नील नदी उत्तरपूर्वी अफ्रीका में उत्तर की ओर बहने वाली एक प्रमुख नदी है और आमतौर पर इसे विश्व स्तर पर सबसे लंबी नदी माना जाता है, जिसकी लंबाई लगभग 6,650 किलोमीटर (4,130 मील) है।