<span>From the above given choices :
melting is an endothermic process</span>
Answer:
B carbon
Explanation
Lewis structure or dot structure is an easy way to get the bonding details of atoms in a molecule. If we talk about methane molecule carbon is central atom with four electrons that are bonded to four hydrogen atoms and each bond is single covalent bond.
Please see attached figure,
Hope it helps!
Third choice because the others make no sense
levels greater than seven are bases
levels on 7 are neutral
levels low than 7 are acids
there are 14 levels, Acids change litmus paper red and Bases change litmus paper blue.