Answer:
atomic number 3
boiling point 1,342 °C (2,448 °F)
specific gravity 0.534 at 20 °C (68 °F)
oxidation state +1
electron configuration 2-1 or 1s22s1
Explanation:
i think this Is right 99% sure
Here, as they both are physical things without any magnetic property & density difference, screening would be best.
In short, Your Answer would be Option C
Hope this helps!
Answer: Heat causes surrounding air to rapidly expand and vibrate, which creates the pealing thunder we hear a short time after seeing a lightning flash.
