Question

1.An object released from the hand, falls on the earth.

2.Sodium is more metallic than aluminium.

scientific reasons

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Answer 1

Explanation:

1. )A stone, when released from the hand, falls towards the earth due to gravitational force. ... Since, the stone's mass is very small as compared to the earth's mass, so acceleration produced in the stone is very large but that in the earth is negligible

2.)Thus, the effective nuclear charge is more on aluminium than sodium and thus aluminium has a smaller size. Thus, removal of electrons from aluminium requires higher energy than sodium i.e. ionization energy of aluminium is higher than sodium. This makes sodium more metallic than aluminium.

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Answer 2

1. An object released from the hand, falls on the earth due to gravity because it pull the object towards the centre of the of the earth.

2. Metallic character decreases as move from left to right in the periodic table, therefore sodium will be more metallic as compared to aluminum