Write the proper charges so that an alkali metal, a noble gas and a halogen have the same electron configurations. what is the # of protons in each? # of electrons in each? how many filled energy levels do each have? arrange them from smallest to largest ie & explain. arrange from smallest to largest radii and explain.

Explanation:

1) Sodium is an alkali metal which positive sodium ion after losing an electron.

After losing an electron it will attain stable electronic configuration.

Number of protons in sodium ion  = 11 protons

All filled energy levels in Sodium ion

2) Neon is noble gas with fully filled outermost valence shell. Inert in nature

Number of protons in neon atom = 10 protons

All filled energy levels in Neon atom

3) Fluorine belongs to halogen family. Highly electro-negative element. By gaining one electron it will attain attain form negatively charged ion

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By gaining one electron it will attain stable electronic configuration.

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Number of protons in fluorine ion = 9 protons

All filled energy levels in fluorine ion

All these ions are isoelectronic species with different number of protons and same number of electrons.

since electrons are negative the answer is neagtaive