Electron Dot Diagrams

Front

What is an Electron Dot Diagram?

Back

An Electron Dot Diagram is a representation of the valence electrons in an atom, shown as dots around the chemical symbol.

Front

What are valence electrons?

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in forming bonds.

Front

How many valence electrons does neon (Ne) have?

Back

Neon has 8 valence electrons.

Front

What is the significance of having 8 valence electrons?

Back

Having 8 valence electrons (octet) makes an atom more stable and less likely to react.

Front

Which element has the following dot diagram: ••Ne•?

Back

This dot diagram is incorrect for neon; it should have 8 dots.

Front

What does it mean for an element to gain or lose electrons?

Back

Gaining or losing electrons allows an element to achieve a full outer shell, typically 8 valence electrons.

Front

Which of the following elements has 5 valence electrons: P, Ar, Na, B?

Back

Phosphorus (P) has 5 valence electrons.

Front

What is the maximum number of electrons that can occupy the outermost shell?

Back

The maximum number of electrons in the outermost shell is 8.

Front

What is the electron configuration for sodium (Na)?

Back

The electron configuration for sodium is 1s² 2s² 2p⁶ 3s¹.

Front

How do you determine the number of valence electrons for an element?

Back

The number of valence electrons can be determined from the group number in the periodic table.