In which sample are the particles arranged in a regular geometric pattern? 1.) HCI (L)
2.) NaCl (aq)
3.) H2 (g)
4.) I2 (s)

4) I2 (s)

Explanation:

Only solids can create regular geometric patterns (crystal structures). NaCl doesn't count in this case because it's dissolved and are in the form of ions.

I₂ (s) is a solid so it can have a regular geometric pattern in it, the molecules will be closely spaced with no translation motion. It will have a fix volume and fix shape.

answer: option (b) is the correct answer.

explanation:

a covalent bond is formed by sharing of electrons. whereas polarity arises due to difference in electronegativity of two atoms.

therefore, more is the electronegativity of an atom which combines with the titanium, more readily it will induce a partial positive and negative charge.

thus, out of the given options fluorine is most electronegative and has an incomplete octet. therefore, it will readily combine with titanium to share the electrons and complete its octet.  

atomic number of carbon is 6

electronic configuration of carbon is 1s²2s²2p²

orbital diagram of c is as shown here in the image.