Question

Write the chemical symbols for three different atoms or atomic cations with 26 electrons.

Answer 1

A neutral iron atom (Fe)

Mn-1 (a manganese that has gained one electron)

Co+1 (a cobalt that has lost on electrons)

All three of these atoms/ions are isoelectronic, meaning that they all have the same number of electrons!

Answer 2

The chemical symbols for three different atoms or atomic cations with 26 electrons are Fe, $Co^+$, $Ni^{2+}$

Explanation:

• The atomic number of an atom is equal to the number of protons
• An atom is neutral, it has an equal number of electrons and protons.
• Element with atomic number 26 is Iron, Fe.
• A neutral atom of iron has an equal number of protons and electrons.

• Cobalt has an atomic number of 27.
• A neutral atom of cobalt has an equal number of protons and electrons.

• Cobalt has 27 electrons and by losing one electron it will form a cobalt (I) ion with 26 electrons.
• The cobalt (I) ion has 26 electrons, $Co^+$.
• Nickel has an atomic number of 28.

• A neutral atom of nickel has an equal number of protons and electrons.

• Nickel has 28 electrons and by losing two electrons it will form a nickel(II) ion with 26 electrons.

• The nickel (II) ion has 26 electrons,$Ni^{2+}$.

So, from this, we can write chemical symbols for three different atoms or atomic cations with 26 electrons are Fe, $Co^+$, $Ni^{2+}$.

Learn more about ions here:

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