In electroplating, the object to be plated is made the: MCQ with Answer and Explanation

Explanation:
Element 117 (tennessine, Ts) is a halogen in Group 17, Period 7. The modern periodic table has 7 periods and 18 groups. Halogens are in Group 17. Period 7 starts with Fr (87) and ends with Og (118). Ts is two places before Og. Exam trick: For atomic numbers after 86 (Rn), use period 7. Group 17 elements are F, Cl, Br, I, At, Ts.

Explanation:
Steel is an alloy of iron with controlled amounts of carbon (0.02-2.1%) and often other elements like manganese, chromium, nickel, etc. Cast iron contains 2-4% carbon. In steelmaking (Bessemer, LD process), impurities like excess carbon, silicon, manganese, sulfur, phosphorus are oxidized and removed, then desired carbon and alloying elements are added to achieve specific properties.

Explanation:
The diagonal relationship occurs when elements in the second period resemble elements in the third period of the next group due to similar ionic sizes and charge-to-radius ratios (polarizing power). Li-Mg, Be-Al, and B-Si are all classic examples of this phenomenon.