REVIEW: Ions, Dot Diagrams, & Predicting Charges

Front

What is an ion?

Back

An ion is an atom or molecule that has a net electrical charge due to the loss or gain of one or more electrons.

Front

What is the charge of a sulfur ion with 6 valence electrons?

Back

S^-2 (sulfur gains 2 electrons to achieve a full outer shell).

Front

How many valence electrons does an element in Group 15 have?

Back

5 valence electrons.

Front

What is a Lewis dot diagram?

Back

A Lewis dot diagram is a representation of an atom's valence electrons using dots around the element's symbol.

Front

How many valence electrons does Magnesium have?

Back

2 valence electrons.

Front

What is the charge of a magnesium ion when it loses its valence electrons?

Back

Mg⁺² (magnesium loses 2 electrons).

Front

How many valence electrons does Aluminum have?

Back

3 valence electrons.

Front

What is the charge of an oxygen ion when it gains electrons?

Back

O^-2 (oxygen gains 2 electrons to achieve a full outer shell).

Front

What is the significance of valence electrons?

Back

Valence electrons determine how an atom can bond with other atoms.

Front

How would you represent the Lewis dot diagram for Oxygen?

Back

O with 6 dots around it representing its 6 valence electrons.