Answer:
4.9 eV .
Explanation:
It is the case of discharge through mercury tube light . In it , mercury atoms are exited due to which electrons are sent to higher energy level . Here current drops to zero because electrons are excited to higher level . Energy are absorbed in quantised manner . Energy absorbed by electrons will be 4.9 eV . That means , difference in energy between two energy level is 4.9 eV .
You didn't Provide choices to choose from. Please fix question and I'd love to be able to help.
Answer: The answer is option A.
Explanation: Particles of matter are packed more loosely in the ground than in the air. This is true because it doesn't have thig like buildings and people stopping the sound waves.
Evaporation. The glass of water was less full after 10 minuets because the water got evaporated
Answer:
elements in the same column have the same number of neutrons. elements with similar mass are placed in the same column.
