Question

name:
what are valence electrons?
period

• valence electrons are the
• to know how many valence electrons an element has, find the element on the

periodic table. the
indicates how many valence electrons it has.
example:
elements in group 2 will
have
valence electrons.
elements in group 17 will
have
valence electrons.

• atoms aim to have a full outer shell of electrons - usually
• this desire to have 8 electrons in their outer energy level is called the

Explanation:

• Valence electrons are the electrons in an atom's outer shell.
• The group number (for main - group elements) on the periodic table indicates the number of valence electrons. For example, Group 2 elements have 2 valence electrons and Group 17 elements have 7 valence electrons.
• The octet rule states that atoms aim to have a full outer shell of 8 electrons (except for hydrogen and helium).

Answer:

• Valence electrons are the electrons in an atom's outer shell.
• The group number (for main - group elements) on the periodic table indicates the number of valence electrons.
• The octet rule (atoms aiming for 8 outer - shell electrons) is also relevant.