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Valence shell
valence shell
The 'rocket body' .
Protons and neutrons form the nucleus of an atom while electrons form the shell of an atom. The electrons in the shell of the atom exist in distinct layers. Those in the outer layer take part in chemical reactions and are involved in electricity. Electrons are also basic particles called leptons. Protons and Neutrons are not basic particles but are composite particles called haldrons. They consist of three basic particles called quarks. Quarks are a basic particle called fermions.
when an element has 8 electron in outer shell it is said to be inert. inert gases are called noble gases.
The negatively charged particles of an atom are in an outer shell.
Valence shell
the shell
The outer shell of a plane can be called the skin. The smoother the skin the faster the plane passes through the air.
An egg with an outer hard shell is called the cuticle or bloom. It helps keep out bacteria and dust.
It is a shell, as in a cockle shell or oyster shell.
valence shell
The outer shell is called the valence shell
the shell
Valence shell and Ultimate Shell
They are the electrons in the (outer) valence shell
The key to "happiness" for an atom is a full outer electron shell. (The outer electron shell is called the valence shell.) There are two conditions that cause a shell not to be full. Either it has only an electron or two (or three) in the outer electron shell or it's short an electron or two in that outer shell. The direct answer to the question is that if an element is chemically active, its outer electron shell is incomplete or is not full.