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The same number as in an atom of Ca, the same as the atomic number of Ca. An ion will have a different number of electrons than protons, so it is not 20. Only neutral atoms have the same number of electrons as protons, which is the same as the atomic number. A calcium ion (Ca+2) has two less electrons than protons (having lost two to fulfill the octet rule), so it has 18 electrons.

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Q: How many protons in positive two ion of calcium?
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Related questions

How many protons neutrons and electrons will positive two ion of calcium have?

20 protons and 18 electrons


How many protons electrons and neutrons does a positive two ion for calcium?

20 p+ 20 n


A positive two ion of calcium ca plus 2 would have how many protons electrons and neutrons?

20 protons, 18 electron's, and 20 neutrons


How many protons and electrons does calcium ion have?

20


How do you tell if an ion is positive or negative from a diagram?

By seeing how many protons to electrons there are. More protons, the Ion is positive. More electrons, the Ion is negative.


How many protons neutrons and electrons does calcium ion have?

20


Does carbonate have calcium carbonate in it?

No. The carbonate ion contains only carbon and oxygen. Since it is a negative ion, it must combine with some positive ion. If that positive ion is calcium, you get calcium carbonate.


When is an atom called ion?

An ion is a electrically charged atom (negative ion) has more electrons that protons and positive ion has more protons that electrons)


Why is the probable charge of an ion of calcium positive?

calcium is a metal which ionizes by electron loss,so a calcium ion has lost to electrons and the positive charge indicates electron deficiency.


How many protons does calcium-39 have?

The number of protons in an element will be the same regardless of the isotope or ion. To have a different number of protons would change what type of element it is. So, it is not necessary to say "how many protons does calcium-41 have?" because it is the same as saying "how many protons does calcium have?" The answer is the same in any case, the same as the atomic number, 20.


How many protons does carbon ion have?

how many protons does the carbonate ion have?


What is the charge of an ion that contains 16 protons?

i think it depends how many electrons it has. then you do something like subtract the electrons from the protons. electrons are negative, protons are positive.