duralumin
(or duralium)
magnalium
aluminium, copper,
magnesium, manganese
aluminium, magnesium
light and strong
balances and other light
instruments, bodies of
aeroplanes and vehicles
utensils, electric heaters,
resistors
German
silver
copper, zinc, nickel
high electrical
resistance
ORAL QUESTIONS
1. Which metalloid can be said to be the backbone of the electronics industry?
2. Steel is not a pure form of iron. What does it consist of? What is the advantage of adding
another substance to iron?
3. Noble metals are used to make jewellery because they are very reactive. Do you agree? Give reasons.
4. Painting a metal prevents it from corroding. Why?
OUR HERITAGE
Recent excavations by archaeologists show that Indians were making iron implements as early
1800 BCE. Around 200 BCE, high quality steel was being produced in India by heating wrought
iron, charcoal and glass until the iron melted and absorbed the carbon. It was called faulad.
It was exported to parts of Asia and Europe.
Answers
Answered by
1
Answer:
answer no.1 is copper. answer no.2 is aluminium and magnesium
Similar questions