Valence Electrons and Ions

Front

What are valence electrons?

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in chemical bonding.

Front

How many valence electrons does Aluminum have?

Back

3 valence electrons.

Front

How many valence electrons does Helium have?

Back

2 valence electrons.

Front

How many valence electrons does Hydrogen have?

Back

1 valence electron.

Front

What charge do Group 17 elements typically form?

Back

-1 charge.

Front

What charge will an Oxygen ion have?

Back

-2 charge.

Front

What is the significance of valence electrons in chemical reactions?

Back

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

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 difference between cations and anions?

Back

Cations are positively charged ions (loss of electrons), while anions are negatively charged ions (gain of electrons).

Front

How do you determine the charge of an ion from its group number in the periodic table?

Back

Elements in Group 1 form +1 ions, Group 2 form +2 ions, Group 13 form +3 ions, Group 15 form -3 ions, Group 16 form -2 ions, and Group 17 form -1 ions.