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

Answers: 3

Show answers

Answers

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

i'm assuming that it's c.) red bank..

What city is located at 17° south 36° east answers: a)surfer’ town b)white’s beach c)red bank d)

Answer from: Quest

Particle exchange energy though elastic collision , hope this .

Another question on Chemistry

Chemistry, 22.06.2019 05:50

Astudent made a graph plotting the progress of a reaction over time. the student forgot to label the y-axis of the graph. a graph is shown with two graph lines. one graph line starts at a higher position on the y axis and slopes downwards towards the right. the other graph line starts at a lower position on the y axis and slopes upwards towards the right. the two graph lines stop short of intersecting each other and continue as separate lines which gradually become straight and parallel to the x axis. a vertical line is shown at a point where the two graph lines finally became parallel to the x axis. this vertical line is labeled equilibrium. the title on the x axis is time and an arrow pointing towards the right is shown above time. the title on the y axis is left blank. what best explains the label that the student should use on the y-axis? amount, because as the amount of product decreases, the amount of reactant increases over time. reaction rate, because forward and backward reaction become equal at equilibrium. amount, because the amounts of reactants and products become constant after equilibrium is reached. reaction rate, as the rate of forward reaction increases and rate of backward reaction decreases over time.

Answers: 3

Answer

Chemistry, 22.06.2019 14:30

Which of the following units is not an official si unit

Answers: 1

Answer

Chemistry, 22.06.2019 16:00

Sulfuric acid is a polyprotic acid. write balanced chemical equations for the sequence of reactions that sulfuric acid can undergo when it's dissolved in water.

Answers: 2

Answer

Chemistry, 23.06.2019 01:30

Use the periodic table to determine how many grams of oxygen would be required to react completely with 859.0 g c2h2

Answers: 3

Answer

You know the right answer?

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

Questions