Forming Ions and Ionic Bonding

The chlorine atom gains seven electrons when it becomes an ion.

• Always true

• Sometimes true

• Never true

For the representative elements, the group number is the same as the number of valence electrons except He. 

• Always true

• Sometimes true

• Never true

Atoms acquire the stable electron structure of a noble gas by losing electrons.

• Always true

• Sometimes true

• Never true

An atom of an element in Group 1 has seven valence electrons.

• Always true

• Sometimes true

• Never true

 Among the Group 1 and 2 elements, the group number of each element is equal to the number of valence electrons in an atom of that element.

• Always true

• Sometimes true

• Never true

Sulfur and magnesium both have two valence electrons.

• Always true

• Sometimes true

• Never true

Correct the mistake.

• Lithium should have 1 valence electron.

• Lithium should have 2 valence electron.

• Lithium should have 4 valence electron.

• Lithium should have 5 valence electron.

Correct the mistake.

• Boron should have 1 valence electron.

• Boron should have 2 valence electrons.

• Boron should have 3 valence electrons.

• Boron should have 5 valence electrons.

Correct the mistake.

• The number of valence electrons should be 4.

• The number of valence electrons should 6.

• There should be 1 energy level only.

• There should be 4 energy levels.

Correct the mistake.

"The chemical formula for sodium oxide is NaO"

• The chemical formula should be NaO_2.

• The chemical formula should be Na₂O_.

• The chemical formula should be SO_2.

• The chemical formula should be S₂O_.