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A valence electron is a type of electron present in an atom that works to aid in the process of chemical bond formation with other atoms. These electrons are present in the outer shell of an atom.


To find the valence electrons in an atom, identify what group the element is in. An element in group 1A has 1 valence electron. For example, Li is in group 1A, so that means it has one valence electron. If the element is in group 2A, then it has two valence electrons.


The valence electrons, the outermost shell of electrons, are the largest determinant of how an atom reacts chemically to other substances in its environment. The number and arrangement of the outermost electron shell are important, as is the placement of the shell itsel...


The properties of valence electrons are determined by the total number of electrons in an atom's outer shell. Atoms with similar numbers of valence electrons are classified into a specific group of elements, which may then combine electrons with other elements to form i...


Platinum has two valence electrons. The amount of electrons found on the outer shell of an element is known as the valence number. These electrons determine the number of bonds that the element can form.


Iron has two valence electrons. The atomic number or iron is 26, and it has 26 electrons and 26 protons. The electron configuration of iron is 1s22s22p63s23p63d64s2 or 2, 8, 14, 2 electrons per shell, so an atom of iron has two electrons in the outermost shell.


One neutral atom of carbon has four valence electrons. An easy way to tell how many valence electrons an element has is to look at the periodic table and find the element's main group number. Carbon is in group 4, which means it has four valence electrons.