Q.In the E-waste generated by the Mobile Phones, which among the following metal is most abundant?

Step 1. Mobile phones contain multiple metals in their circuit boards and components, including copper (wiring and PCB traces), silver, palladium and gold (used in tiny quantities as high-conductivity electrical contacts).

Step 2. While gold, silver and palladium are present and valuable per gram, they occur only in trace amounts; copper is used far more extensively throughout the phone's internal wiring and circuitry, making it by far the most abundant metal by mass in mobile-phone e-waste. …

Distinguish abundance by mass (copper) from value-per-gram (gold, silver, palladium) …

• Assuming gold must be most abundant because it is most often highlighted as valuable in e-waste recycling. …