Answer:
A options hydrogen
Explanation:
valence outermost element is hydrogen.
The correct answer is A. Diamond is an example of elemental carbon. It is an allotrope of carbon where the atoms are arranged in a face-centered cubic crystal structure. It is less stable than the other allotrope of carbon which is graphite.
Answer:
Melting point
Explanation:
it's constant temperature at which the bonds of a solid Crystal lattice are broken down by overcoming the attractive forces converting it to liquid