Question

name: period what are valence electrons? • valence electrons are the in an atom. • 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 ex: carbon has how many valence electrons? ex: chlorine has how many valence electrons?

Explanation:

Valence electrons are the outermost electrons in an atom. In the periodic table, the group number (for main - group elements) indicates the number of valence electrons. For example, Group 2 elements have 2 valence electrons, and Group 17 elements have 7 valence electrons. Atoms aim to have a full outer shell of electrons, usually 8 electrons, and this is called the octet rule.

Answer:

• Valence electrons are the outermost electrons in an atom.
• The group number (for main - group elements) indicates how many valence electrons it has.
• Elements in Group 2 will have 2 valence electrons.
• Elements in Group 17 will have 7 valence electrons.
• Atoms aim to have a full outer shell of electrons - usually 8 electrons.
• This desire to have 8 electrons in their outer energy level is called the octet rule.