To seven significant figures the mass of a proton is

A) the enthralling of formation for pure element in its standard state is always positivehope this : )

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Ibelieve the answer is d. titaniumhope my answer has you : )

Well you can immediately rule out a and d because if a metal were to lose or gain protons, then it would become a different element all together. the answer here is b because the positive symbol with a number refers to how many electrons the metal can give away to become stable.