Question

among the following the monovalent electropositive element is option A oxygen option B potassium option C chlorine option d neon​

Answer 1

Answer:

Potassium

Explanation:

because potassium is the alkali metal and first group monovalent element

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Answer 2

Answer:

The monovalent electropositive element is potassium.

Explanation:

(A) Oxygen:

• The electron configuration of oxygen is [He] 2s² 2p⁴.
• In oxygen, 2 electrons lack to achieve octet configuration to become stable.
• But, the nuclear attraction of electrons are more so it has a tendency to accept 2 electrons and becomes an electronegative element.
• So, oxygen is electronegative divalent.

(B) Potassium:

• The electron configuration of potassium is [Ar] 4s¹.
• In potassium, 1 electron lacks to complete the outer 4s shell to become stable.
• But the ionisation potential of the potassium is low hence it loses one electron and becomes an electropositive element.
• So, potassium is electropositive monovalent.

(C) Chlorine:

• The electron configuration of chlorine is [Ne] 3s² 3p⁵.
• In chlorine, 1 electron lacks complete octet configuration and becomes stable.
• But in chlorine, the nuclear attraction of electrons are more so it accepts one electron and becomes an electronegative element.
• So, chlorine is electronegative monovalent.

(D) Neon:

• Neon has [He]2s²2p electron configuration and have octet configuration in its outer shell.
• Hence, it does not donate or accept any other electrons to become stable.

So, from the above discussion it is proved that potassium is electropositive monovalent.