54:16 Which statement describes a property of covalent compounds?
They have a high boiling point because of strong intermolecular forces
They have a low boiling point because of weak intermolecular forces
They have a low melting point because of strong intermolecular forces
They have a high melting point because of weak intermolecular forces
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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.  

radioactive decay occurs in unstable atomic nuclei – that is, ones that don't have enough binding energy to hold

the nucleus together due to an excess of either protons or neutrons.