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Calcium has atomic number 20. A neutron calcium atom therefore has 20 protons and 20 electrons. Ca2+ has a charge of positive 2, so it must have 2 more protons than electrons. Ca2+ has 18 electrons.

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Q: How many electron ca2 plus?
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Related questions

S2- Cl1- K1 plus and Ca2 plus are all with Ar?

They have the same electron configuration as argon, which means they are isoelectronic with argon.


S2 Cl1 K1 plus and Ca2 plus are all with Ar?

They have the same electron configuration as argon, which means they are isoelectronic with argon.


Is ca plus 2 or mg plus 2 larger?

The Ca2+ ion is larger than the Mg2+ ion. The ionic radii are: 86pm for the Mg2+ and 114pm for the Ca2+. Besides the fact that the Ca2+ has more electrons this can be explained by the principle of electron shielding. Electron shielding is when lower level electrons block the EFC(effective nuclear charge) from effecting the valence electrons of an ion. Ca2+has more electrons than Mg2+ so more electron shielding occurs.


S2- Cl1- and Ca2 plus are all with Ar?

They have the same electron configuration as argon, which means they are isoelectronic with argon.


Did Ca plus plus gain an electron to produce the charge?

Ca2+ is positively charged. Remember that an electron is a particle with negative charge; therefore, the element Calcium (Ca) has LOST 2 electrons in order to be positive 2.


How many centimoles of charge of Ca2 plus are needed to replace 2 centimoles Na plus?

1


Which particle is bigger Ca or Ca2 plus?

Ca2 is basically two Ca's so it's larger (the plus doesn't compensate)


How do you arrange in order of increasing size S2- Cl- K plus Ca2 plus now arrange them in order of increasing ionization energy what is the electron configuration of each?

is electronic all have electronic config of {Ar} size Ca^2+^<k+<Cl-<s2-< IE S2-<CL-<K+<CA2+


Does calcium gain electron?

Calcium loses two electrons; the cation is Ca2+.


Does Ca2 have an identical electron configuration as anything else?

Yes, it is identical to Ar.


How many electrons must be lost Ca to attains a noble gas electron?

Calcium must lose 2 electrons and will become Ca2+. It will then have the electron configuration of Argon, a noble gas.


Why does a calcium ion have a charge of plus 2?

because for it to become an ion it needs to lose 2 electron which means that it would have 2 more proton than electron and proton is positively charged so it becomes 2+