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An atom of radium (Ra) forms a monatomic ion.Which ion does it most likely form?Ra2−uppercase R lowercase a superscript 2 minus end superscriptRa+uppercase R lowercase a superscript plus end superscriptRa2+uppercase R lowercase a superscript 2 plus end superscriptRa−

User Theanine
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1 Answer

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An ion corresponds to an atom that has gained or lost electrons. When an atom loses electrons it will have a positive charge, one for each electron lost. If the atom gains electrons it will have a negative charge, one for each electron it gains.

Now, whether an element loses or gains electrons depends on its valence electrons, generally when the valence number is less than 5 the element will tend to lose electrons and form a positively charged ion. If the element has more than 5 electrons, it will gain electrons and will have a negative charge.

Radium (Ra) is located in group II of the periodic table, so this element has 2 valence electrons. It means that the "Ra" will lose its valence electrons and the ion will have a positive charge +2.

Therefore, the answer will be: Ra2+

Answer:

Ra2+

uppercase R lowercase a superscript 2 plus end superscript

User Barry Gallagher
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