Chemistry, 01.02.2020 00:05 alizeleach0123

Which electrons are removed from the outermost shell of a calcium atom, the atom becomes
a)an anion that has a larger radius than the atom
b)an anion that has a smaller radius than the atom
c)a cation that has a larger radius than the atom
d)a cation that has a smaller radius than the atom

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Answer from: lilpetals

Answer is: D) a cation that has a smaller radius than the atom.

Atomic number of calcium is 20, it means that it has 20 protons and 20 electrons, so atom of calcium is neutral.

When calcium lost two electrons, it will have 20 protons (positive charge) and 18 electrons (negative charge), which means it has two protons more and it has +2 oxidation number.

Electron configuration of calcium atom: ₂₀Ca 1s² 2s² 2p⁶ 3s² 3p⁶ 4s².

Electron configuration of calcium cation: ₂₀Ca²⁺ 1s² 2s² 2p⁶ 3s² 3p⁶.

Calcium cation is smaller than neutral calcium atoms, because when an electrons are lost, electron-electron repulsion decreases and the protons are better able to pull the remaining electrons towards the nucleus.

Answer from: leannaadrian

Answer is: D) a cation that has a smaller radius than the atom.

Atomic number of calcium is 20, it means that it has 20 protons and 20 electrons, so atom of calcium is neutral.

When calcium lost two electrons, it will have 20 protons (positive charge) and 18 electrons (negative charge), which means it has two protons more and it has +2 oxidation number.

Electron configuration of calcium atom: ₂₀Ca 1s² 2s² 2p⁶ 3s² 3p⁶ 4s².

Electron configuration of calcium cation: ₂₀Ca²⁺ 1s² 2s² 2p⁶ 3s² 3p⁶.

Answer from: tracijp

I think that the answer is C cation that has a larger radius than the atom

Answer from: kiwi6316

I think that the answer is C cation that has a larger radius than the atom

Answer from: Quest

no, the red giant is the hottest with 2.00.000.000 degrees celsius. while the white dwarf only 25,000 degrees celsius.

Answer from: Quest

it’s previous models because when i picked that son of a gun’s answer it was wrong look for previous models because they might make it a different letter

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Which electrons are removed from the outermost shell of a calcium atom, the atom becomes
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