At first, atoms were considered to be very simple and indivisible. People form ancient times knew only of water, earth, fire, and air, not what constitutes them or how they work specifically. Now, there are 118 elements and all atoms are proven to consist of neutrons, protons, and electrons, and that's just the beginning of it.
Answer:
Two reagents that can be used to distinguish between ethane and ethyne are Tollens' reagent and ammoniacal CuCl solution.

Here's the balanced chemical equation for above reaction ~

Here, fluorine is more more more reactive than Bromine, therefore it replaces Bromine from its compound and forms Lithium floride.
Answer:
Lithium has a melting point of 180.54 C, a boiling point of 1342 C, a specific gravity of 0.534 20 C
Explanation: