Question

19
Our Surrounding
Metals
Till the seventeenth century, humans knew of only twelve metals. Twelve more
were discovered in the eighteenth century. We now know of 86 metals.
Answer these questions to test your knowledge of metals.
CH
fo
1.
C С
2.
3.
4.
Plutonio
1.
the natural elements.
A pillar made of this metal, dating from AD 400, is still standing in Delhi. However, the technolog
that keeps it from corroding has been lost to the world.
This toxic metal was extensively used to make containers and pipes. It is malleable, ductile and
non-corrosive. Ancient Egyptians used it as dye paint.
This is the most chemically active of the noble metals. It is the brightest reflector of all metals
(except for liquid mercury) and the best conductor of heat and electricity.
Another name for this metal is quicksilver. It can dissolve silver and gold. It is the only metal which
is liquid at room temperature.
Cookware made from this metal is the first choice of many chefs. During the Chalcolithic period, it
was used for making the earliest metallic tools and weapons.
This alloy is a mixture of iron and carbon. It is harder and stronger than iron but also more brittle.
5.
6.
7.
8.
This is an alloy of copper and tin, with small amounts of other metals. It was extensively used in
ancient times. It is used to make medals.
This metal is almost non-corrosive. Stone age man used it to make jewellery. Its chemical symbol
comes from the Latin word for dawn.
9.
* Copper tubing in a 5,000 year-old water
plumbing system found in the pyramid of
Cheope in Egypt was still in usable
condition
This hard, grey, radioactive metal is used in nuclear reactors and weapons. It is the heaviest of​

Answer 1

The right answer is...

1. Uranium

2. iron

3. lead

4. Silver

5. Mercury

Answer 2

Mark as brainliest answer