Question

(b) Consider the following elements:
Gold, Silver, Copper, Carbon (Graphite), Sulphur, Phosphorus
Which of these elements are?
(i) Malleable and ductile
(ii) Brittle​

Answer 1

$\sf\huge\underline{Answer}$

Gold - Malleable and ductile

$\bullet$Gold is a metal whose symbol is Au. The atomic number of Gold is 79.

$\bullet$Being a soft metal, Gold is used to make various previous jewellery items.

Silver - Malleable and ductile

$\bullet$Silver comes in the category of metals with atomic number 47. The symbol of Silver is Ag.

$\bullet$Silver is also used to make jewellery.

Copper - Malleable and ductile

$\bullet$Copper is a metal with atomic number 29. The symbol of Copper is Cu.

$\bullet$Being a very good conductor of heat and electricity, Copper is used in batteries. As it is a slippery metal, it is also used in fat moving machinery.

Carbon (Graphite) - Brittle

$\bullet$Carbon (Graphite) is a non-metal. Being a form of carbon, Graphite's atomic number is also 6. The symbol of Carbon is C.

$\bullet$Diamond, A form of carbon is used in making jewellery. Diamond is used to cut glass and it is used to make radiation proof windows of satellites.

Sulphur - Brittle

$\bullet$Sulphur is a non-metal with atomic number 16. The symbol of Sulphur is S.

$\bullet$Sulphur is used to make sulphuric acid. It is a highly reactive non-metal.

Phosphorus - Brittle

$\bullet$Phosphorus is a non-metal with atomic number 15. The symbol of phosphorus is P.

$\bullet$It is used in the production of fertilizers.

Answer 2

Answer:

(1) Malleable and Ductile-

Gold, Silver, Copper

(since they are metals, so they are malleable and ductile)

(2) Brittle-

Carbon, Sulphur, Phosphorus

(Since they are non-metals, they are brittle)

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