Based on their location on the periodic table which of the elements is the least reactive element? 1- Ca
2-Cl
3-Na
4- Ti

Noble gases are nonreactive, nonmetallic elements in group 18 of the periodic table. Noble gases are the least reactive of all elements. That's because they have eight valence electrons, which fill their outer energy level.

4.Ti

Explanation:

Because it is a group VIII element or an inert gas. or noble gas (Inert gas)

- It has 8 full valence electrons, making it a non-reactive gas.

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