The distance between the nuclei of two carbon atoms in its elemental form is (a) 77 pm
(b) 154 pm
(d) 120 pm
(c) 17 pm

its B: 154.

Explanation:

the bond lenth between two atoms in a molecule depends not only on the atoms but also on such factors as the orbital hybridzation and the electronic and steric nature of the substituents. the carbon-carbon (C-C) bond length in diamonds is 154 pm.

the atomic number will stay the same no matter how many electrons it has, so it doesn’t decrease nor increase. it’ll only change with a different number of protons

in chemistry, adhesion and cohesion are attractive forces that exist between molecules. they hold the molecules together from each other. they are different in that adhesive force exists between molecules of different substance while cohesive force happens between molecules of same substance.

adhesion between water and glass causes water molecules at the edge of water and glass interface to climb up the wall in a narrow glass tube. this is called capillary action. cohesion is what gives glass its shape and causes water to form a droplet.