Question

what element reacts with potassium to form a salt has relatively high ionization energy and is isoelectronic with argon?

Answer 1

Chlorine (Cl) reacts with potassium (K) to form potassium chloride (KCl), a salt where both ions are isoelectronic with argon.

Step-by-step explanation:

The element that reacts with potassium to form a salt, has relatively high ionization energy, and is isoelectronic with argon is chlorine (Cl). Chlorine has an atomic number of 17, and once it gains an electron, it forms a chloride ion (Cl-) with an electron configuration the same as argon (18 electrons in total).

Potassium (K), with an atomic number of 19, will lose one electron to form a potassium ion (K+), which also has 18 electrons and is thus isoelectronic with argon. This ionic exchange results in an ionic compound known as potassium chloride (KCl), a typical salt.

Answer 2

Correct option is A)

Ionization potential is the amount of energy required to remove an electron from an atom or a molecule in the gaseous state. Hydrogen has only one electron in its valence shell or s orbital and ionisation energy decreases from top to bottom in a group as the atomic size increases and as electron cloud goes farther away from the nucleus. So, hydrogen has the highest ionisation potential.

Step-by-step explanation:

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