Answer:
An atom that contains ten protons and ten electrons is likely to be chemically inert (stable).
Explanation:
An atom has 10 electrons. Its electron configuration is 1s² 2s² 2p⁶. The last level gives us information about the period in which the element is and the sum of the electrons in the last level gives us information about the group in which the element is. This element belongs to the Period 2 and Group 2 + 6 = VIIIA (18). This group corresponds to noble gases so the element is expected to be chemically inert because its valence shell is complete with 8 electrons.
