What kind of ion will oxygen (O) form? Class 9

What kind of ion will oxygen (O) form? Class 9

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Question 1.

What kind of ion will oxygen (O) form? Class 9

Answer:

Oxygen (atomic number 8) has electronic configuration 2, 6. It has 6 electrons in its valence shell and needs 2 more electrons to complete its octet. Since oxygen has more than 4 valence electrons, it gains electrons rather than losing them. Oxygen gains 2 electrons to form an oxide anion with a charge of 2^-, represented as O^2-.

Question 2.

Fill in the blanks. Class 9

Among magnesium and chlorine, magnesium atom can give two electrons to become Mg²⁺. However, chlorine can take only one electron to become _________. Now, _________ ion of magnesium and _________ ions of chlorine combine to give magnesium chloride.

Answer:

Among magnesium and chlorine, magnesium atom can give two electrons to become Mg²⁺. However, chlorine can take only one electron to become Cl^-. Now, one ion of magnesium and two ions of chlorine combine to give magnesium chloride (MgCl₂).