Potassium ion; potassium cation; K+
a positive charge
This is the cation K+.
K+ ions
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Atomic number of Lithium is three. It has got two electrons in the first orbit. The third electron is free and in the outermost orbit. The atomic number of Sodium is 11 and that of potassium is 19. Sodium and potassium one electron in the outermost orbit. This outermost electron can be easily donated to have stable configuration. That is like Neon and Argon, respectively. So sodium and potassium can conveniently give up the last electron, rather than taking seven electrons to complete the outermost orbit. When sodium gives an electron, it loses about ten percent of charge. If potassium loses an electron, it loses about 5.5 percent charge. But if Lithium loses an electron, it loses 33.33 percent electrical charge. It will become grossly electrically positive in that case. Lithium feels uncomfortable to lose that much electrical charge. If Lithium forms the covalent bond, it does not have to become grossly electrically positive. Rather the electrical charge remains same, as the electrons are shared up in case of covalent bond. That is the reason as the why Lithium forms covalent bond, unlike other alkaline metals.
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Because Pure water had very few ions; which are needed to conduct the electricity itself. While dirty water or salt water is a great conductor, because it has many other elements fused into the water making this kind of water a solution.
Electrical Energy
Electrical Energy
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When a fluorine atom gains an electron, it forms a negative ion.
Atomic number of Lithium is three. It has got two electrons in the first orbit. The third electron is free and in the outermost orbit. The atomic number of Sodium is 11 and that of potassium is 19. Sodium and potassium one electron in the outermost orbit. This outermost electron can be easily donated to have stable configuration. That is like Neon and Argon, respectively. So sodium and potassium can conveniently give up the last electron, rather than taking seven electrons to complete the outermost orbit. When sodium gives an electron, it loses about ten percent of charge. If potassium loses an electron, it loses about 5.5 percent charge. But if Lithium loses an electron, it loses 33.33 percent electrical charge. It will become grossly electrically positive in that case. Lithium feels uncomfortable to lose that much electrical charge. If Lithium forms the covalent bond, it does not have to become grossly electrically positive. Rather the electrical charge remains same, as the electrons are shared up in case of covalent bond. That is the reason as the why Lithium forms covalent bond, unlike other alkaline metals.
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Potassium lose an electron (iodine gain this electron) to form potassium iodide, KI.
The ionic charge of potassium iodide is determined by the groups of the elements. Potassium is in the 1st column of the periodic chart, so it is group 1, and forms a +1 cation. Iodine is a halogen (group 7) and will add an electron to fill its shell with 8 electrons, so its charge is -1.
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Potassium has to lose 1 electron in order to form an ion. Once it does, it is known as a cation (ion with a positive charge,) and its symbol is K+
KCl's Charge is neutral since K has a charge of 1+ and Cl has a charge of 1-
plus one, always!