Select all that apply. the law of conservation of matter: a. requires that matter must have had an origin outside of itself. b. describes the idea that mass is neither lost nor gained in a chemical reaction. c. states that the number and kinds of atoms present before and after a chemical reaction remain constant. d. is not apparent by looking at the chemical equation for a reaction.

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.  

"record the time to complete a chemical reaction" would most likely be part of a lab procedure.