Question

the size of an atom is determined by its​

Answer 1

Answer:

• Air escapes from the balloon that carries momentum. By momentum conservation, the balloon acquires momentum which is exactly opposite to the momentum of the escaping air. Therefore, it flies in a direction which is opposite to the velocity of the escaping air

Answer 2

The size of an atom is determined by its atomic shells.

• The atomic radius of an atom is the distance from the centre of the nucleus to the outermost shell. This increases with the increase in number of valence shells.
• Another factor affecting the size of an atom is the nuclear charge. This is the attractive force exerted by the nucleus of an atom on its electron shells.
• Higher the nuclear charge, more the attraction and hence smaller the size of the atom.