no, its a mixture
Some common aqueous acids, from strongest to weakest: hydrochloric acid (HCl) carbonic acid (H2CO3) acetic acid (CH3COOH) Some common aqueous bases, from strongest to weakest: sodium hydroxide (NaOH) ammonia (NH3) sodium bicarbonate (NaHCO3) See the Related Questions link for more about acids and bases.
The only things that won't melt at high temperature are those that decompose first. For instance, wood will burn long before it melts! Many many things decompose at high temperatures before they melt. If it doesn't decompose first, everything will eventually melt.
It should be in such a conformation that the ethyl group is at the e-bond position or, in other words, a more horizontal position.
The first x-ray was taken in 1895 by Wilhelm Conrad Rontgen. He used an enclosed discharge tube of a cathode ray in a sealed, black carton so that no light would reach the tube, and but a paper plate covered in barium platinocyanide on ones side. The first x-ray was taken of his wife's hand.