What is the ion notation an atom with 34 protons and 36 electrons-

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What is the ion notation for an atom with 34 protons and 36 electrons?

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Solution

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Z = 34, therefore the atom is selenium.

Explanation:

While the number nuclear protons as given is 34, and therefore we deal with the element selenium, there are 2 more electrons than protons, and therefore this species has an overall 2− charge.

We represent this selenide ion as $$Se^{2−}$$.

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