EXPERIMENT 3 STUDY QUESTIONS (TO PREPARE FOR EXAMS) T/F 1. Metal ores are mostly

Question

EXPERIMENT 3 STUDY QUESTIONS (TO PREPARE FOR EXAMS) T/F 1. Metal ores are mostly metal oxi T/F 2. Less than half of the elements we know are metals. T/F 3. The particular color of a beam of light is due to its wavelength. T/F 4. A jeweler knows an item is 14K gold if the 14K test acid dissolves its mark on the T/F 5. Ifa magnet sticks to an item, it is probably made of gold. T/F 6. Gold is a very unreactive metal. T/F 7. Fool's gold will leave a yellow streak on an unglazed white porcelain tile. T/F 8. The colors of fireworks comes from metal salt components. T/F 9. Potassium gives a bright yellow flame test. T/F 10. The line spectra for fluorescent light has very distinct bands. 11. What metal is contained in the most common fool's gold? 12. How will a fake gold piece react with the test acids? touch stone.

Explanation / Answer

1. True: most metals are metal oxides as most metals oxidize easily.

2. FAlse: most elements are metal, including s block, d-block and some of p-block.

3. True. Wavelength determines the color.

4. True. If acid dissolves, that means it is 14K.

(4 parts at a time. ) Have a nice day!

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