Por qué dos iones sodio reemplazan un ion de calcio o de magnesio

Why two sodium ions replace a calcium or magnesium ion

Explanation:

Two sodium ions will replace a calcium or magnesium ion because, a sodium ion is has just one positive charge, it has lost an electron. A calcium or magnesium ion has two electrons.

           Sodium ion  -   Na⁺

            Magnesium ion - Mg²⁺      Calcium ion Ca²⁺

For a replacement in the lattice of a mineral to occur between sodium and any of magnesium or calcium, two of it must be used so as to balance the charge properly;

                 Na⁺   +  Na⁺ will replace Mg²⁺ or Ca²⁺ in crystal space

This will allow for perfect charge replacement.

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percent abundance for cu-63 can be shown as:

63 x + 65 (1-x) = 62.9296

65 - 62.9296 = 2 x

x = 1.035

thus, percent abundance for cu-63 is 1.035

percent abundance for cu-65 can be shown as:

63 x + 65 (1-x) = 64.9278

65 - 64.9278 = 2 x

x = 0.0361

thus, percent abundance for cu-63 is 0.0361

the mass spectrum of cu-63 showing the intense peak as, this isotope is found in nature more abundantly around 92.38 % in comparison to cu-65 which is found 62.58 % naturally