Question

Name a metal (a) which can be easily cut with a knife
(b) which forms amalgams
(c) which has no fixed shape
(d) which has a low melting point
(e) which is yellow in colour

Answer 1

Answer:

a)sodium potassium

b)silver copper

c)sodium

d)gold

Answer 2

a) Sodium can be easily cut with a knife.

(b) Amalgams are formed by mercury.

(c) There is no fixed shape for mercury.

(d) The metal that has a low melting point is sodium.

(e) Gold

Explanation:

• Sodium is a good conductor of heat and electricity and can be easily cut with a blade. This is because of the reason that its valence shell has only one electron. Due to this, it has free electrons carrying energy and weaker metallic bonding.  
• Mercury does not have a definite shape because it is a liquid during standard conditions of pressure and temperature.  
• God is a metal with reddish-yellow colour. The colour of this metal is determined by the plasma oscillations’ frequency among the valence electrons.

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